This recipe uses smarter ingredient swaps to create a cake that is lighter, packed with protein, and has zero refined sugars, all while looking like an indulgent dream. The "Cloud" texture comes from whipped egg whites, while the richness comes from a unique white chocolate-style protein glaze and real raspberries.
Recipe: Healthier & Delectable Raspberry Protein Cloud Cake
A guilt-free interpretation of a classic, this stunning four-layer cake features an airy vanilla protein sponge, pockets of intense raspberry compote, and a velvety sugar-free white chocolate frosting. Perfect for fitness enthusiasts with a sweet tooth.
Prep time: 30 minutes
Cook time: 25-30 minutes
Chill time: 2 hours (for frostings/compote)
Yields: 1x 6-inch, 4-layer cake (Serves 8-10)
Ingredients
Part 1: The Vanilla Protein Cloud Sponge
6 large egg whites (room temperature)
2 large whole eggs (room temperature)
½ cup (120g) plain non-fat Greek yogurt
½ cup (120ml) unsweetened almond milk (or milk of choice)
1 tsp vanilla extract
¾ cup (90g) vanilla protein powder (whey-casein blend is best for baking; check that it contains sweetener)
½ cup (60g) coconut flour (do not substitute 1:1 for other flours)
½ cup (60g) oat flour (blitz rolled oats in a blender)
⅓ cup granulated erythritol or monk fruit sweetener (optional, if your protein powder isn't sweet enough)
2 tsp baking powder
¼ tsp salt
Pinch of cream of tartar (helps stabilize egg whites)
Part 2: Zero-Sugar Raspberry Compote (Filling)
2 cups (approx. 250g) fresh or frozen raspberries
2 tbsp water
2-3 tbsp granulated erythritol or monk fruit sweetener (adjust to taste)
1 tbsp chia seeds (acts as the thickener instead of cornstarch)
Part 3: The White Chocolate Protein Frosting & Filling
1 ½ cups (360g) plain non-fat Greek yogurt (must be thick)
8 oz (226g) light cream cheese, softened
¾ cup (90g) vanilla protein powder (or white chocolate flavor if you have it)
⅓ cup powdered erythritol or monk fruit sweetener (must be powdered for smoothness)
½ tsp vanilla extract
Optional: 2 tbsp melted sugar-free white chocolate chips (cool slightly before adding)
Part 4: Assembly & Topping
1 cup fresh raspberries (for topping)
Equipment Needed
Two 6-inch round cake pans
Parchment paper
Electric hand mixer or stand mixer
Three mixing bowls
Small saucepan
Spatula
Detailed Instructions
Step 1: Prepare the Raspberry Compote (Filling)
Do this first so it has time to chill and set.
In a small saucepan, combine the 2 cups of raspberries, water, and sweetener over medium heat.
Bring to a gentle simmer, mashing the berries slightly with a fork. Cook for 5-8 minutes until the berries have broken down and released their juices.
Remove from heat and stir in the chia seeds. The mixture will look runny at first.
Transfer to a bowl and refrigerate for at least 1 hour, or until completely cool and set into a jam-like consistency.
Step 2: Bake the Protein Cloud Sponge
Preheat your oven to 325°F (165°C). Grease and line the bottoms of two 6-inch round cake pans with parchment paper.
Separate the eggs: Place the 6 egg whites and the pinch of cream of tartar into a large, super clean bowl. Place the 2 whole eggs into a separate medium bowl.
Prepare the wet mixture: To the bowl with the 2 whole eggs, add the Greek yogurt, almond milk, and vanilla extract. Whisk until smooth and combined.
Prepare the dry mixture: In a third bowl, whisk together the vanilla protein powder, coconut flour, oat flour, sweetener (if using), baking powder, and salt. Make sure there are no lumps.
Combine wet and dry: Gently pour the wet mixture into the dry mixture. Fold gently with a spatula until just combined. The batter will be thick (coconut flour absorbs liquid fast). Set aside.
Whip the egg whites: Using your electric mixer, whip the egg whites and cream of tartar on high speed until stiff, glossy peaks form. You should be able to hold the bowl upside down without them moving.
The Folds (Crucial Step): Add one-third of the whipped egg whites to the thick batter. Mix it in relatively vigorously to "lighten" the batter's texture. Then, add the remaining egg whites in two batches, folding extremely gently with a spatula. Do not overmix or use the electric mixer here, or you will deflate the air you just created.
Divide the batter evenly between the two prepared pans. Smooth the tops.
Bake for 25-30 minutes, or until the tops are golden, the edges are pulling away slightly, and a toothpick inserted in the center comes out clean.
Allow the cakes to cool in the pans for 10 minutes, then invert onto a wire rack to cool completely before slicing and frosting.
Step 3: Mix the White Chocolate Protein Frosting
In a medium bowl, use the electric mixer to beat the softened cream cheese, powdered sweetener, and vanilla extract until smooth and creamy.
Add the vanilla protein powder and the optional melted (but cool) sugar-free white chocolate, and beat again until fully incorporated and fluffier.
Gently fold in the thick Greek yogurt with a spatula. Do not over-beat the yogurt, or the frosting may become too runny.
Refrigerate the frosting for at least 30 minutes to firm up.
Step 4: Assemble the Four-Layer Cake (The Fun Part!)
Level and Split the Cakes: Once the cakes are completely cool, use a serrated knife to carefully trim any domed tops (so they are flat). Then, slice each 6-inch cake horizontally into two even layers, giving you four layers total.
Layer 1: Place one cake layer on your serving plate. Spread about ¼ cup of the white chocolate protein frosting evenly over the layer.
Raspberry Pocket: Use a spoon to add several small, scattered dollops of the chilled raspberry compote into the frosting (about 2-3 tablespoons total). This creates the distinct raspberry pockets seen in the image.
Layers 2, 3, and 4: Repeat this process for the next two layers: Cake -> Frosting -> Raspberry pockets -> Cake.
Top Layer: Place the final cake layer on top (cut-side down for a flat surface).
Crumb Coat (Optional but Recommended): Spread a very thin layer of frosting over the entire cake (top and sides) to trap any crumbs. Chill the cake for 20 minutes.
Final Frosting: Use the remaining frosting to generously coat the top and sides of the cake. For the decorative edges seen in the image, you can use a piping bag with a star tip (e.g., Wilton 1M or 2D) to pipe decorative dollops around the top edge.
The Topping: Finish by generously piling fresh, whole raspberries in the center, just like the image.
Notes and Pro-Tips for Success:
Casein Blend is Key: For baking protein cakes that aren't dry, use a protein powder that is a blend of whey and casein (or 100% casein). Casein absorbs liquid better and creates a softer crumb. 100% whey tends to dry out or become rubbery in the oven.
Measure Flour Correctly: Spoon the oat and coconut flour into the measuring cup and level it off. Don't scoop directly from the bag, as this packs the flour and will lead to a dense, dry cake.
Let It Set: While tempting to eat immediately, this cake is best after it has sat in the fridge for at least 2 hours (or overnight). This allows the moisture from the compote and frosting to seep into the sponge, enhancing the texture and flavor.
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