Sourdough Cloud Cake Recipe – Light, Fluffy & Delicious
If you have sourdough starter or discard in your refrigerator, this Sourdough Cloud Cake is a wonderful way to use it. This homemade cake is soft, airy, lightly sweet, and delicately flavored with vanilla and sourdough. Unlike rich and heavy cakes, this version gets its signature cloud-like texture from whipped egg whites, which create a light and delicate crumb.
This recipe makes a beautiful dessert for afternoon tea, coffee breaks, weekend baking, or whenever you want to turn leftover sourdough discard into something special. A simple dusting of powdered sugar is all you need, although fresh berries and whipped cream make it even more inviting.
Why You’ll Love This Sourdough Cloud Cake
There is something special about a cake that feels incredibly light while still having plenty of flavor. This recipe combines the gentle tang of sourdough with vanilla, eggs, and a touch of lemon zest for a fresh homemade taste.
Light and Airy Texture
The whipped egg whites are the key to the cake’s fluffy texture. Folding them carefully into the batter creates tiny air pockets that help the cake rise and stay delicate.
Great for Sourdough Discard
Instead of letting extra sourdough starter go to waste, you can use it in this simple dessert. Both sourdough starter and discard can be used.
Simple Ingredients
Most of the ingredients are everyday baking staples, making this a convenient recipe to prepare whenever you have extra starter available.
Easy to Customize
You can serve it plain with powdered sugar or add berries, whipped cream, citrus zest, cinnamon, or a light chocolate variation.
Ingredients
This recipe makes one 8-inch cake.
For the Cake
- 1 cup sourdough starter or sourdough discard
- 4 large eggs, separated
- ¾ cup all-purpose flour
- ½ cup granulated sugar
- ¼ cup neutral oil or melted butter
- 1 teaspoon vanilla extract
- 1 teaspoon baking powder
- ¼ teaspoon fine salt
- 2 tablespoons milk
- 1 teaspoon lemon zest, optional
For Serving
- Powdered sugar, optional
- Fresh berries, optional
- Whipped cream, optional
For the best results, bring the sourdough starter and eggs closer to room temperature before beginning.
How to Make Sourdough Cloud Cake
Step 1: Prepare the Pan and Oven
Start by preheating your oven to 350°F (175°C).
Lightly grease an 8-inch round cake pan and line the bottom with parchment paper. You can lightly grease the sides as well, but avoid applying too much grease.
Set the prepared pan aside while you make the batter.
Step 2: Separate the Eggs
Carefully separate the four eggs, placing the whites in one completely clean, dry mixing bowl and the yolks in another bowl.
Take care not to allow any yolk to get into the egg whites. Even a small amount of fat can make it difficult to whip the whites properly.
The whipped egg whites are an important part of creating the cake’s airy texture, so this step is worth taking your time with.
Step 3: Make the Sourdough Batter
Add the sourdough starter to the bowl containing the egg yolks.
Add the oil or melted butter, milk, and vanilla extract. Whisk everything together until smooth.
Next, add the flour, baking powder, salt, and optional lemon zest. Mix gently just until the ingredients are combined.
The batter may seem fairly thick at this point. That is normal. The whipped egg whites will loosen the mixture and provide most of its lightness.
Avoid overmixing.
Step 4: Whip the Egg Whites
Using a hand mixer or stand mixer, begin beating the egg whites over medium speed.
Once they become foamy, gradually add the granulated sugar while continuing to beat.
Keep mixing until the whites become glossy and form medium-to-stiff peaks. When you lift the beaters, the peaks should remain standing.
Do not continue beating until the whites become dry or grainy. Smooth, glossy egg whites are much easier to fold into the batter without losing their air.
Step 5: Fold the Egg Whites Into the Batter
Add about one-third of the whipped egg whites to the sourdough batter.
Use a spatula to gently fold them into the mixture. You can be slightly more thorough with this first portion because it helps loosen the thicker batter.
Add another third of the egg whites and fold gently.
Finally, add the remaining egg whites. Fold slowly using sweeping movements from the bottom of the bowl toward the top.
Stop as soon as the batter is mostly combined. A few small streaks of egg white are better than overmixing because excessive stirring can remove the air you worked to create.
Step 6: Fill the Cake Pan
Pour the finished batter into the prepared 8-inch cake pan.
Use a spatula to gently smooth the surface.
Avoid banging or aggressively tapping the pan against the counter. Doing so can knock some of the air out of the batter.
Place the pan in the center of the preheated oven.
Step 7: Bake
Bake the cake for approximately 30–38 minutes.
The exact time can vary depending on your oven and the depth of your pan.
The cake should become lightly golden on top and gently spring back when touched.
To check for doneness, insert a toothpick into the center. It should come out clean or with just a few moist crumbs attached.
If the top begins browning too quickly while the center still needs additional baking time, loosely cover the cake with foil for the remaining baking period.
Step 8: Cool Completely
Remove the cake from the oven and place the pan on a cooling rack.
Let it cool for about 10–15 minutes.
If necessary, carefully run a thin knife around the edges of the cake before removing it from the pan.
Transfer the cake to a cooling rack and allow it to cool completely before slicing. The delicate crumb continues to set as the cake cools, and cutting it while very hot can cause the soft structure to compress.
Step 9: Finish and Serve
Once the cake has completely cooled, lightly dust the top with powdered sugar.
You can serve it simply as it is, or add fresh strawberries, blueberries, raspberries, or sliced peaches.
For a more indulgent presentation, serve each slice with a little whipped cream.
Tips for the Fluffiest Sourdough Cloud Cake
Use room-temperature ingredients: Eggs and sourdough starter that are not very cold generally combine more easily.
Keep the egg whites completely clean: Make sure your bowl and beaters are free from grease and that no yolk gets into the whites.
Avoid overmixing: Mix the sourdough batter only until the ingredients are combined.
Fold gently: The whipped egg whites provide much of the cake’s airy structure, so use slow, gentle folding motions.
Avoid opening the oven too early: Keeping the oven closed during the early baking period helps maintain a stable temperature while the cake rises.
Let the cake cool: The structure becomes firmer and more stable as the cake cools.
Can You Use Sourdough Discard?
Yes. This recipe works with either active sourdough starter or sourdough discard.
Fresh starter may have a relatively mild fermented flavor, while older discard can provide a more noticeable tang.
If your discard has developed a layer of liquid, you can handle it according to your usual sourdough routine before measuring it for the recipe.
Always use starter that looks and smells normal for your sourdough culture. If it shows signs of mold or unusual spoilage, do not use it.
Easy Flavor Variations
Lemon Sourdough Cloud Cake
For a brighter citrus flavor, increase the lemon zest slightly. You can also experiment with orange zest for a sweet citrus variation.
Chocolate Cloud Cake
For a chocolate version, replace a small portion of the all-purpose flour with unsweetened cocoa powder. Keep the amount moderate so the delicate cake structure is not unnecessarily weighed down.
Cinnamon Cloud Cake
Add a little ground cinnamon to the batter for a warm, comforting flavor. This version is especially nice during cooler months.
Berry-Topped Cloud Cake
Keep the cake simple and decorate it with fresh strawberries, blueberries, raspberries, or a mixture of berries just before serving.
How to Serve Sourdough Cloud Cake
This light cake works beautifully with a variety of toppings and drinks.
Try serving it with:
- Fresh strawberries
- Blueberries
- Raspberries
- Whipped cream
- Greek yogurt
- Powdered sugar
- A small spoonful of nut butter
- Coffee
- Tea
Because the cake is light and not overly rich, it can work as an afternoon snack, breakfast-style treat, or simple dessert.
How to Store the Cake
Once completely cooled, place the cake in an airtight container.
It can be kept at room temperature for approximately 2 days.
For longer storage, cover it well and refrigerate it. Chilling can make the cake somewhat firmer, so allow refrigerated slices to sit at room temperature for several minutes before serving.
If you decorate the cake with whipped cream or fresh fruit, keep it refrigerated.
Can You Freeze Sourdough Cloud Cake?
Yes, the cake can be frozen.
Allow it to cool completely before freezing. You can wrap individual slices tightly in plastic wrap or place them in freezer-safe containers.
The cake can be frozen for up to approximately 2 months.
Thaw individual slices in the refrigerator or at room temperature. For the best presentation, add powdered sugar, whipped cream, or fresh berries after thawing.
Frequently Asked Questions
Can I make this cake with sourdough discard?
Yes. Both active starter and discard can be used. Older discard may give the finished cake a slightly more pronounced sourdough flavor.
Why is my cloud cake not fluffy?
The whipped egg whites are especially important. Make sure the bowl and beaters are clean and free from grease, whip the whites until glossy peaks form, and fold them gently into the batter.
Can I use melted butter instead of oil?
Yes. The recipe allows either neutral oil or melted butter.
Can I leave out the lemon zest?
Absolutely. Lemon zest is optional. For a simple vanilla-flavored cake, leave it out.
How do I know when the cake is done?
The top should be lightly golden and spring back gently when touched. A toothpick inserted into the center should come out clean or with a few moist crumbs.
What toppings work best?
Powdered sugar is the simplest option. Fresh berries and whipped cream are also excellent choices.
Sourdough Cloud Cake Recipe Card
Recipe: Sourdough Cloud Cake
Yield: 1 8-inch cake
Oven Temperature: 350°F (175°C)
Bake Time: 30–38 minutes
Ingredients
- 1 cup sourdough starter or discard
- 4 large eggs, separated
- ¾ cup all-purpose flour
- ½ cup granulated sugar
- ¼ cup neutral oil or melted butter
- 1 teaspoon vanilla extract
- 1 teaspoon baking powder
- ¼ teaspoon fine salt
- 2 tablespoons milk
- 1 teaspoon lemon zest, optional
Instructions
- Preheat oven to 350°F (175°C) and prepare an 8-inch round cake pan with parchment.
- Separate the eggs, keeping the whites completely free from yolk.
- Mix sourdough starter, egg yolks, oil or butter, milk, and vanilla.
- Add flour, baking powder, salt, and optional lemon zest. Mix just until combined.
- Whip egg whites, gradually adding sugar, until glossy medium-to-stiff peaks form.
- Gently fold the whipped whites into the sourdough batter in three additions.
- Transfer the batter to the prepared pan.
- Bake for 30–38 minutes, or until lightly golden and a toothpick comes out clean.
- Cool for 10–15 minutes in the pan, then remove and cool completely.
- Dust with powdered sugar and serve with berries or whipped cream if desired.
Final Thoughts
Sourdough Cloud Cake is a simple and delicious way to give leftover starter or discard a new purpose. The combination of sourdough, vanilla, and whipped egg whites creates a cake that is delicate, lightly sweet, and pleasantly tangy.
The most important part of the recipe is handling the egg whites carefully. Whip them until glossy, then fold them gently into the batter to preserve as much air as possible.
Once baked and cooled, keep the cake simple with powdered sugar or dress it up with fresh berries and whipped cream. Whether you make it for a weekend dessert, afternoon tea, or simply because you have sourdough discard to use, this light homemade cake is an easy recipe worth adding to your sourdough collection.
