There’s something so beautiful about a cake that feels almost as light as a cloud. This Sourdough Cloud Cake is soft, fluffy, delicate, and gently sweet, with a subtle tang from sourdough starter.
It’s a wonderful way to use sourdough discard while making a dessert that feels special without being complicated. The texture is airy and tender, making every bite melt softly in your mouth.
If you love light homemade cakes and have some sourdough discard waiting in the fridge, this recipe is definitely worth trying!
🌿 Introduction
This Sourdough Cloud Cake gets its signature fluffy texture from carefully folded whipped egg whites. The sourdough discard adds a subtle depth of flavor without making the cake taste strongly sour.
It’s perfect for afternoon tea, a simple dessert, or whenever you want something lighter than a rich, heavy cake.
The secret is to gently fold the whipped egg whites into the batter so you don’t lose all that beautiful air.
💛 Why You Will Love This Recipe
This cake is:
- ☁️ Super light and fluffy – A soft texture that feels almost cloud-like.
- 🥣 Great for sourdough discard – A delicious way to use leftover starter.
- 🍰 Gently sweet – Perfect if you prefer lighter desserts.
- 🥚 Tender and airy – Whipped egg whites create a beautiful texture.
- ☕ Easy to serve – Wonderful with tea, coffee, or fresh fruit.
Once you make it, you’ll understand why this simple cake feels so special.
🛒 Ingredients List
For this Sourdough Cloud Cake, you’ll need:
- ½ cup sourdough discard
- ¾ cup all-purpose flour
- ½ cup granulated sugar
- 4 large eggs, separated
- ¼ cup milk
- ¼ cup neutral oil or melted butter
- 1 teaspoon vanilla extract
- 1 teaspoon baking powder
- ¼ teaspoon salt
- ½ teaspoon lemon zest, optional
For topping:
- Powdered sugar, optional
- Fresh berries, optional
- Lightly whipped cream, optional
Tip: Room-temperature eggs whip more easily and help create a lighter cake.
👩🍳 Step-by-Step Instructions
1. Prepare the Oven
Preheat your oven to 325°F (165°C).
Grease and line the bottom of an 8-inch round cake pan with parchment paper.
2. Mix the Sourdough Batter
In a medium bowl, whisk together the sourdough discard, egg yolks, milk, oil or melted butter, vanilla, and lemon zest if using.
Mix until smooth.
3. Add the Dry Ingredients
Sift together the flour, baking powder, and salt.
Gradually add the dry ingredients to the sourdough mixture and whisk gently until just combined.
Don’t overmix the batter.
4. Whip the Egg Whites
Place the egg whites in a clean, dry bowl.
Beat them until foamy, then gradually add the sugar while continuing to beat.
Keep mixing until you have glossy, soft-to-medium peaks.
This step is important because the whipped egg whites are what give the cake its airy, cloud-like texture.
5. Fold Everything Together
Add about one-third of the whipped egg whites to the sourdough batter.
Gently fold them in to loosen the mixture.
Add the remaining egg whites in two additions, folding carefully with a spatula.
Try not to stir aggressively, because you want to keep as much air in the batter as possible.
6. Bake the Cake
Pour the batter gently into the prepared pan and smooth the top.
Bake for approximately 30–40 minutes, or until the cake is lightly golden and a toothpick inserted into the center comes out clean.
Avoid opening the oven too early, as sudden temperature changes can affect the cake’s rise.
7. Cool Completely
Remove the cake from the oven and let it cool in the pan for about 10 minutes.
Then carefully transfer it to a wire rack and allow it to cool completely.
Dust with powdered sugar before serving if desired.
✨ Pro Tips & Variations
- Use room-temperature eggs: They whip up more easily.
- Fold gently: Overmixing can remove the air from the egg whites.
- Don’t overbake: Remove the cake once the center is set to keep it tender.
- Add citrus: Lemon or orange zest gives the cake a fresh flavor.
- Add berries: Fresh strawberries, raspberries, or blueberries make a lovely topping.
- Make it chocolate: Add a little cocoa powder and adjust the flour slightly.
- Serve with cream: A small spoonful of lightly whipped cream makes it extra special.
One important tip: Make sure your mixing bowl and beaters are completely clean and free from grease before whipping the egg whites.
🥗 Simple Ingredient Benefits
This cake uses simple ingredients that each have a purpose:
- Eggs provide protein and help create the cake’s structure.
- Sourdough starter adds fermented flavor and helps reduce food waste.
- Milk contributes moisture and tenderness.
- Egg whites create the airy structure that makes the cake so light.
It’s still a dessert, so enjoy it as a sweet treat alongside a balanced meal or snack.
🍽️ Serving Suggestions
This Sourdough Cloud Cake is delicious served:
- With fresh berries 🍓
- Dusting of powdered sugar
- With lightly whipped cream
- Alongside tea or coffee
- With a drizzle of honey
- With fresh fruit and yogurt
For a pretty presentation, keep the cake simple with powdered sugar and a handful of fresh berries.
❄️ Storage Tips
Store the cooled cake in an airtight container at room temperature for up to 2 days.
If topped with whipped cream or fresh fruit, refrigerate it and enjoy within 2–3 days.
You can also freeze the plain cake. Wrap it well and freeze for up to 2 months. Thaw it completely before serving.
❓ Frequently Asked Questions
Can I use active sourdough starter?
Yes. Active starter can be used, although sourdough discard works especially well for this recipe.
Why is my cake not fluffy?
The most common reason is overmixing the whipped egg whites into the batter. Fold gently to preserve the air.
Can I make this cake without lemon zest?
Absolutely. Lemon zest is optional and simply adds a fresh citrus flavor.
Can I add chocolate?
Yes! Chocolate chips or a light chocolate variation can work beautifully, although heavier additions may slightly change the airy texture.
How do I know when the cake is done?
The top should be lightly golden, the center should feel set, and a toothpick inserted into the middle should come out clean or with a few moist crumbs.
🌟 Conclusion
This Sourdough Cloud Cake is soft, delicate, and wonderfully airy, making it a beautiful way to turn simple sourdough discard into something special.
With its fluffy texture, gentle sweetness, and subtle sourdough flavor, it’s perfect for an afternoon treat or a simple homemade dessert.
