Sourdough Discard Mug Cake [quick sourdough recipe] (2024)

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This quick and easy sourdough discard mug cake can be made in under 10 minutes. It's a sourdough microwave mini cake of sorts and is perfect for a fast dessert or even a little mid morning treat with hot coffee for us chocolate lovers!

A speedy take on sourdough chocolate cake, you can make this egg free sourdough starter discard mug cake using any milk you like (even plant based milk so you can make it vegan). It uses simple ingredients you're bound to have in your pantry to create a delicious dessert with the most amazing texture.

Served with a scoop of vanilla ice cream, this sourdough mug cake recipe will become your go to way to use up your sourdough discard.

If you love quick sourdough recipes, you're going to love these no wait sourdough waffles and these chocolate chunk sourdough muffins. You might also like to peruse these 60+ sourdough discard recipes for even more inspiration.

Sourdough Discard Mug Cake [quick sourdough recipe] (1)

Using Sourdough Discard in a Cake

This little sourdough mug cake utilises 40g of sourdough discard per serve. You can of course use active sourdough starter if you have a bit on hand (sometimes I do this if I have a bit leftover from making sourdough bread or sourdough pizza crust).

While this cake uses sourdough discard, you don't want to use sourdough discard that's been sitting around too long and is too sour as it will overpower the flavor of this chocolate cake. I recommend using "fresh" sourdough discard that hasn't been sitting more than 24 hours - but just give yours a sniff if it's a little older and judge it for yourself.

How To Make Sourdough Discard Mug Cake

This sourdough microwave mini cake could not be easier to pull together! You don't even need a bowl - you can mix it all in the mug (although if you are making two or more, I do find it easier to mix it in a bowl and then add the cake batter to the mugs before cooking).

I love that there are so many ways to personalise this easy recipe - from adding raspberry jam or peanut butter to stirring through white chocolate chips or even fresh raspberries. I've put some lovely recipe variations further down - there's sure to be one that takes your fancy!

I've used a 400ml or 13.5oz mug.

  1. Add all the dry ingredients to your mug and mix until well combined.
  2. Now add the milk, oil, sourdough starter and vanilla extract (if using) to the dry ingredients and mix really well until it forms a glossy cake batter. So you are adding all of the wet ingredients to the dry ingredients.
  3. Add a teaspoon of peanut butter or raspberry jam to the top of the cake batter and push down until it's covered.
  4. Place the mug in the microwave for 2 minutes on high power. The sourdough mug cake is done when the cake has risen and is firm to the touch. Please be careful as it will be extremely hot when taking out of the microwave.
  5. Sprinkle with powdered sugar and serve with vanilla ice cream or double cream.
Sourdough Discard Mug Cake [quick sourdough recipe] (2)
Sourdough Discard Mug Cake [quick sourdough recipe] (3)
Sourdough Discard Mug Cake [quick sourdough recipe] (4)

Ingredient Notes

  • All purpose flour works best in this recipe. You can substitute self rising flour if you wish (just leave out the baking powder if you do this or it will overflow in the microwave).
  • You can use any type of sugar you like. I've used white granulated sugar in developing this recipe, but brown sugar, coconut sugar or even maple syrup works well.
  • Unsweetened cocoa powder works best, but this recipe will also work with raw cacao or Dutch processed cocoa.
  • I've used whole milk however this recipe works with any milk, including plant based milk. It's also egg free, so using plant based milk will give you a vegan sourdough mug cake.
  • I've used vegetable oil in this recipe however you can use any light flavored oil you have on hand - just nothing with too strong a flavor or it will ruin the flavor of the cake. Coconut oil works really well with the chocolate flavors in this cake.
Sourdough Discard Mug Cake [quick sourdough recipe] (5)

Flavor Variations for Sourdough Discard Mug Cake

Now this recipe tastes amazing as it is, however, there are lots of things you can add to it to make it taste next level good and enjoy it in different ways:

  • A few tablespoons of chocolate chips (whether white chocolate, semi sweet - whatever you fancy). Just stir them in with the wet ingredients.
  • For a take on a chocolate lava cake, push a few squares of your favorite chocolate into the centre of the cake batter before you cook it. This is a perfect Valentine's Day treat to share with the one you love.
  • Use a teaspoon of your favorite flavor jam - raspberry, strawberry, blueberry all work really well.
  • For a caramel twist, add some caramel sauce to the cake batter just before cooking or add a couple of caramel lollies and push them into the batter.
  • Sprinkle the cooked cake with grated chocolate before enjoying.

Can You Store This Sourdough Mug Cake?

I recommend cooking and eating this sourdough mug cake straight away. The texture can become a bit stodgy if it's left and eaten later, so I don't recommend storing it to eat the next day. The small portions sizes mean it's the perfect size for dessert - with no leftovers or food waste.

Frequently Asked Questions

Do I have to make this recipe in a mug?

No! You can of course use a bowl or any microwave safe container you prefer. A mug does make it easy to remove from the microwave because of the handle.

Can I bake this recipe in the oven rather than cook it in the microwave?

Yes you can cook this recipe in the oven. Use oven safe ramekins or mini cake tins and bake for 20 to 25 minutes at 160C (320F) or until a skewer comes out clean. The cakes will get more of a crunchy top when baked in the oven, but the underneath will still be moist like the microwave version.

Does this recipe work without egg?

Yes this sourdough mug cake has a great flavor and texture without egg. Using the sourdough starter gives the cake a rich, velvety texture. It's also really handy if you can't have eggs, or don't have any on hand, but still want cake!

Sourdough Discard Mug Cake [quick sourdough recipe] (6)

Sourdough Discard Mug Cake

This quick and easy sourdough discard chocolate mug make is perfect for a quick dessert or a little mid morning treat. Add some jam or peanut butter to amp up the flavor!

3.78 from 81 votes

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Prep Time 5 minutes mins

Cook Time 2 minutes mins

Total Time 7 minutes mins

Course Dessert, Snack

Cuisine American

Servings 1 person

Calories 294 kcal

Equipment

  • 1 Microwave Safe Mug (400ml or 13.5oz capacity)

Ingredients

  • 25 g All Purpose Flour
  • 10 g Cocoa Powder
  • 25 g Sugar
  • 3 g Baking Powder
  • pinch Salt
  • 40 g Sourdough Starter (discard - not too sour)
  • 35 g Milk (any milk you like dairy or plant based)
  • 20 g Vegetable Oil
  • ½ tsp Vanilla Extract (optional)
  • 1 tsp Raspberry Jam (optional) (peanut butter or caramel sauce work well too)

Instructions

  • Add all the dry ingredients to your mug and mix until well combined.

  • Now add the milk, oil, sourdough starter and vanilla extract (if using) to the dry ingredients and mix really well until it forms a glossy cake batter.

  • Add a teaspoon of peanut butter or raspberry jam to the top of the cake batter and push down until it's covered.

  • Place the mug in the microwave for 2 minutes on high power. The sourdough mug cake is done when the cake has risen and is firm to the touch. Please be careful as it will be extremely hot when taking out of the microwave.

  • Serve with vanilla ice cream or double cream.

Notes

Sourdough Discard - I have used sourdough discard that is "fresh" and not more than 24 hours old. I don't recommend using old discard for this recipe as the sourness can really overpower this cake.

Flavor additions - you can choose to leave out the raspberry jam or you could use caramel or chocolate sauce, different flavored jams, peanut butter or even a few squares of your favorite chocolate. You can also stir through dried fruit, nuts, chocolate chips or even m&ms! Yum!

Milk - you can use any milk you like. I've made this with whole milk but non dairy, plant based milks are also fine.

Mug Size - I made this recipe in a mug that holds 400mls or 13.5 oz. This was the perfect size as the cake cooked with room left in the mug for a big scoop of ice cream. You can easily double this recipe - I double the ingredients and mix in a small bowl before transferring to two mugs.

Nutrition

Calories: 294kcalCarbohydrates: 65gProtein: 7gFat: 3gSaturated Fat: 2gPolyunsaturated Fat: 0.2gMonounsaturated Fat: 1gCholesterol: 4mgSodium: 337mgPotassium: 241mgFiber: 5gSugar: 31gVitamin A: 57IUVitamin C: 1mgCalcium: 238mgIron: 3mg

Keyword Sourdough Discard

Tried this recipe?Share your creation with us @ThePantryMama or tag #thepantrymama!

« Sourdough Starter Lid On or Off?

How To Add Sourdough Discard To Any Recipe »

Reader Interactions

Comments

  1. Sourdough Discard Mug Cake [quick sourdough recipe] (8)Stella Lim

    I don’t have baking power, can I use baking soda? If yes, what qty should I use? Thanks.

    Reply

    • Sourdough Discard Mug Cake [quick sourdough recipe] (9)The Pantry Mama

      no it needs to be baking powder 🙂

      Reply

  2. Sourdough Discard Mug Cake [quick sourdough recipe] (10)Susan

    We have no microwave. Can this me done in oven?

    Reply

    • Sourdough Discard Mug Cake [quick sourdough recipe] (11)The Pantry Mama

      Yes there are instructions for the oven in the post x

      Reply

  3. Sourdough Discard Mug Cake [quick sourdough recipe] (12)Giulie

    Sourdough Discard Mug Cake [quick sourdough recipe] (13)
    The texture was light and delicious. Because the recipe was for one mug cake, I doubled it. Unfortunately I must have used a mug that was not large enough (thought it was), so the first one I did overflowed. I transferred the second one into a jumbo-sized mug and that worked out fine.
    I think if I do this again, I will use this recipe to make two mug cakes and that would be PLENTY of cake. I recommend adding chocolate chips and the raspberry jam - otherwise it's a very plain chocolate cake.
    Thank you!

    Reply

  4. Sourdough Discard Mug Cake [quick sourdough recipe] (14)Sharon Quick

    Sourdough Discard Mug Cake [quick sourdough recipe] (15)
    Tried this tonight in a 14oz wider base mug; I microwaved 1:50 at power level 8 and it was perfect consistency. I think I would add 50pct more sugar though 🤪

    Reply

  5. Sourdough Discard Mug Cake [quick sourdough recipe] (16)Vickie

    I really struggle with the conversion from grams to oz/cups. Any suggestions? I know some sites have converters built in. Would you ever consider this? I love your recipes but I have not successfully made one yet.

    Reply

    • Sourdough Discard Mug Cake [quick sourdough recipe] (17)The Pantry Mama

      It's really important to weigh ingredients rather than use volume measures like cups. I highly recommend getting a scale and giving it a try. You'll find that your baking is much more accurate and you'll have better success 🙂 You can see why it's so important to weigh ingredients here.

      Reply

Leave a Reply

Sourdough Discard Mug Cake [quick sourdough recipe] (2024)

FAQs

Do you have to discard sourdough starter every time you feed it? ›

With each sourdough starter feeding, you'll be discarding some to avoid it from becoming overly acidic. Most will compost or trash this discard, but you can save it and use it in other recipes!

Can I bake sourdough discard by itself? ›

#3 Sourdough Flavor, No Flour Added

Similar to case #2, above, discarded sourdough is used in recipes with no additional flour called for, so it can be baked immediately. The discarded starter's flour is already fermented and it adds sourdough flavor to the recipe.

What happens if you don't discard sourdough starter? ›

If you don't get rid of the excess, eventually you'll have more starter than your feedings can sustain. After a few days, your daily 1/4 cup flour and water won't be enough to sustain your entire jar of starter, and your starter will be slow and sluggish, not much better than discard itself.

How much sourdough to discard? ›

Room-temperature starter should be fed every 12 hours (twice a day) using the standard maintenance feeding procedure: discard all but 113g, and feed that 113g starter with 113g each water and flour.

Can I leave sourdough discard out overnight? ›

I left my sourdough discard out at room temperature for a few days. Is it okay? As long as your kitchen isn't too warm (I'd say 78°F or higher) your starter/discard will be fine stored at room temperature for at least a few days without feeding. The flavor will get more acidic the longer it sits.

Why is my sourdough starter bubbling but not rising? ›

If your starter gets completely covered on top with bubbles but does not rise, it is healthy but may just be a wet mix. Try reducing the water in your next feeding and see if you have different results. Also, the type of flour you are using can impede the rise of your starter.

Can you use sourdough discard immediately? ›

But just because you remove sourdough discard, that doesn't mean you have to actually throw it away. You can bake with it, either immediately or at a later date, and make everything from bread to cookies to granola and more.

How long can you keep sourdough discard before it goes bad? ›

Sourdough discard only lasts a day or two at room temperature. As such, it is best to keep your discard in the fridge, where it will last for up to one week. Of course, you can only rely on it lasting that long if you store it correctly.

Does sourdough discard need to be room temperature before using? ›

Store it for future baking: You can store sourdough discard in an airtight container in the refrigerator for future baking with sourdough discard recipes. When you're ready to use it, let the discard come to room temperature before using it to bake.

Does sourdough discard have to be active? ›

On the other hand, sourdough discard refers to the portion of the starter that is removed and discarded before feeding the remaining starter during regular maintenance. It contains some of the fermented mixture but may not be as active as a fully refreshed starter.

What is a substitute for sourdough discard? ›

and then you will just replace the sourdough discard. with sourdough starter. A 1 to 1 substitute. You might need to adjust the rise times of the recipe.

Can you reuse discarded sourdough starter? ›

Absolutely! A jar of sourdough discard serves as an insurance policy against starter death. If you have some discard on hand, remove a spoonful of it and feed it fresh flour and water in a clean jar. You should have a bubbly starter ready to bake with after a couple of feedings, depending on the discard's condition.

Can I feed my sourdough starter without discarding? ›

Once the sourdough starter is established on day 8, all you have to do is just give it flour and water. You no longer need to discard half of it.

Can you use 2 week old sourdough discard? ›

Therefore, you can store discard indefinitely, but I suggest using discard within 1-2 weeks. Over time, the discard will become more sour-tasting as it continues to ferment and develop lactic acid. That's why I like to use fresh discard for more sweet recipes, and older discard for more savory recipes.

Is baking with sourdough discard healthy? ›

In conclusion, sourdough discard is a versatile, flavourful, and healthy ingredient that can enhance a wide range of recipes.

Do I leave my sourdough starter out after I feed it? ›

If you bake couple of times a week or once a week, best to move the starter in the fridge. You would then remove it from the fridge for feeding ahead of preparing the dough. Can I leave my starter out overnight after feeding it? Yes, if you have just fed it.

How long can you wait to use discarded sourdough starter? ›

You can store sourdough discard in the fridge for up to 2 weeks. It's fine to leave it on the counter for up 24 hours, however if you aren't planning to use it straight away it's always better to store it in the fridge. You can continue to add sourdough starter from different days to the same jar.

Can you feed sourdough starter too often? ›

Overfeeding can be a cause of this “sickness,” as can lack of feeding and neglect. Because, yes, you can overfeed your sourdough. The explanation is quite simple: if you add too much water and flour, you're basically diluting the natural population of yeast and bacteria.

What is the difference between discard and active starter? ›

I would say the best way to differentiate between discard and active starter is that active starter is starter that has doubled and peaked whereas discard is any starter that is not the main starter and is not being used in an active sourdough recipe as a leavening agent.

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