A light, airy, melt-in-your-mouth cake with impressive protein and low-carb credentials.
Recipe Card
Servings and Timing
- Prep Time: 20 minutes
- Cook Time: 35–40 minutes
- Total Time: ~1 hour
- Yield: 10–12 slices
Dietary Badges
- Keto-Friendly
- Low-Carb
- High-Protein
- Gluten-Free
- Sugar-Free
Ingredients
- 1 cup high-protein Greek yogurt (Skyr preferred)
(or high-protein coconut or soy yogurt for dairy-free) - 1½ cups powdered erythritol
- 1½ cups unsalted butter, softened
- ½ cup almond flour
- 1 cup coconut flour (reduced for balance)
- ¼ cup unflavored whey isolate or egg white protein powder
- 16 g baking powder
- 1 teaspoon sugar-free vanilla extract
- A pinch of salt
- 5 large eggs, separated
- 2–3 tablespoons extra yogurt or almond milk (for moisture)
Instructions
- Preheat the oven to 360°F (180°C). Line a 22 cm (9-inch) round cake pan with parchment paper.
- In a large bowl, beat the softened butter and powdered erythritol until pale, light, and fluffy.
- Add the egg yolks one at a time, mixing well after each addition.
- Mix in the Greek yogurt, vanilla extract, and extra yogurt or almond milk until smooth.
- In a separate bowl, whisk together the almond flour, coconut flour, protein powder, baking powder, and salt.
- Gradually add the dry ingredients to the wet mixture, mixing gently until just combined.
- In another bowl, beat the egg whites until soft peaks form.
- Carefully fold the egg whites into the batter in 2–3 additions, keeping the mixture airy.
- Pour the batter into the prepared pan and smooth the top.
- Bake for 35–40 minutes, or until a toothpick inserted in the center comes out clean.
- Allow the cake to cool completely at room temperature before slicing.
Additional Notes
- This recipe naturally fits keto, low-carb, and gluten-free diets.
- For best texture, use room-temperature ingredients.
- Ingredient substitutions and variations are listed below.
Introduction
This Cloud Cake is designed for readers who want the recipe immediately, without scrolling through unnecessary filler. Light as air yet rich enough to feel indulgent, it delivers impressive protein content while staying keto-friendly and sugar-free. Whether you’re baking for dietary goals or simply craving a fluffy, bakery-style cake, this recipe keeps things efficient, satisfying, and reliable.
Step-by-Step Cooking Guide
Preparing the Base
Start by creaming the butter and powdered erythritol thoroughly. This step is essential for incorporating air into the batter, which helps create the signature cloud-like crumb. The mixture should look pale and smooth before moving on.
Tip: If the butter looks greasy rather than fluffy, it may be too warm. Chill slightly and continue beating.
Incorporating Yolks and Yogurt
Adding the egg yolks one at a time ensures proper emulsification. The yogurt provides moisture, structure, and protein while balancing the richness of the butter.
Tip: Skyr works especially well here due to its thickness and high protein content.
Dry Ingredients Stage
Whisking the flours, protein powder, baking powder, and salt separately prevents clumping and ensures even distribution. Coconut flour is highly absorbent, so precise measuring is important.
Tip: If the batter appears very thick at this stage, a tablespoon of almond milk can help loosen it.
Folding in Egg Whites
Beating the egg whites to soft peaks and folding them in gently is what gives this cake its lift. Use a spatula and fold slowly to avoid deflating the batter.
Tip: Stop folding as soon as no white streaks remain.
Baking and Cooling
Bake until set and lightly golden. Cooling fully is critical, as the cake continues to firm up and stabilize as it rests.
Ingredient Details and Substitution Tips
Key Ingredients Explained
- Greek Yogurt / Skyr: Adds protein, moisture, and tenderness. Skyr is preferred due to its thickness.
- Coconut Flour: Provides structure while keeping carbs low, but must be used sparingly.
- Protein Powder: Reinforces structure and boosts protein content without drying the cake.
Substitutions
- Dairy-Free: Use coconut or soy high-protein yogurt and vegan butter.
- Protein Powder: Egg white protein works best; whey isolate is the next best option.
- Sweetener: Powdered monk fruit sweetener can replace erythritol in equal amounts.
Equipment Alternatives
- No stand mixer needed; a hand mixer works well.
- Egg whites can be whipped manually with a whisk, though it requires more effort.
Recipe Variations and Serving Suggestions
Flavor Variations
- Add 1 teaspoon lemon zest for a bright citrus version.
- Mix in ½ teaspoon cinnamon or cardamom for warmth.
- Fold in sugar-free chocolate chips (¼ cup) for a dessert-style cake.
Dietary Variations
- Dairy-Free Keto: Use coconut yogurt and plant-based butter.
- Higher Protein: Increase protein powder to ⅓ cup and add 1 tablespoon almond milk.
Serving Suggestions
- Serve plain with coffee or tea.
- Top with whipped mascarpone, keto whipped cream, or fresh berries.
- Dust lightly with powdered erythritol for a classic finish.
Storage and Make-Ahead Information
Storage
- Store in an airtight container at room temperature for 2 days.
- Refrigerate for up to 5 days.
Freezing
- Freeze individual slices wrapped tightly for up to 2 months.
- Thaw overnight in the refrigerator.
Reheating
- Best enjoyed at room temperature.
- For a warm slice, microwave for 10–15 seconds.
Make-Ahead Tips
- The cake can be baked one day ahead and stored covered at room temperature.
- Flavor and texture improve slightly after resting overnight.
Nutrition Facts (Estimated Per Slice)
- Calories: ~210 kcal
- Protein: ~9 g
- Fat: ~18 g
- Net Carbs: ~3 g
Dietary Highlights
- Low-Carb
- High-Protein
- Keto-Friendly
Allergens
Contains dairy, eggs, and nuts.
Frequently Asked Questions
Q: Can I use all almond flour instead of coconut flour?
A: No. Coconut flour absorbs significantly more liquid. Replacing it directly will result in a very wet batter.
Q: Why did my cake sink slightly after baking?
A: This is usually due to over-folding the egg whites or opening the oven door too early.
Q: Can I make this in a loaf pan?
A: Yes, but increase baking time to 45–50 minutes and check for doneness in the center.
Q: Can I freeze the batter?
A: Freezing the baked cake is recommended instead. The batter may lose volume if frozen.
Additional Notes and Story
This Cloud Cake was developed to solve a common problem: protein-heavy, keto-friendly cakes are often dense and dry. Through multiple tests, adjusting flour ratios and incorporating whipped egg whites, this version achieves a balance between light texture and nutritional performance. It’s now a reliable go-to for anyone wanting a cake that feels indulgent without straying from low-carb goals.
If you try this recipe, consider sharing your variations or results. Small tweaks can lead to surprisingly good discoveries, and feedback always helps refine future versions.
