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Yields: 6 generous slices
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Prep Time: 15 minutes
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Cook Time: 25-30 minutes
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Cooling Time: 1 hour (essential!)
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Total Time: ~1 hour 50 minutes
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Difficulty: Easy (Requires an electric whisk for best results)
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Slimming World Syns: ZERO per serving when using the specified ingredients. It’s completely Free on the plan.
Ingredients
Gather these simple, Syn-free staples. The beauty of this cake is its versatility, so we’ve included some optional additions to make it your own.
The Base Cloud:
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4 large eggs, separated
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1 tub (500g) fat-free natural yogurt (We recommend a thick, creamy brand like Skyr for the best texture)
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1 tsp vanilla extract
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2 tbsp granulated sweetener that measures like sugar (e.g., Sukrin:1 or Canderel)
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1 tsp cream of tartar (this is key for stabilising the egg whites)
The Flavour Canvas (Optional Add-ins):
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Zest of 1 lemon
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A handful of fresh berries (raspberries or blueberries work beautifully)
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1 tsp cocoa powder (sifted) for a chocolate version
Equipment You’ll Need:
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Two large, clean mixing bowls
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Electric hand whisk or stand mixer
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Spatula
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8-inch (20cm) springform cake tin
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Baking parchment
Method: Crafting Your Cloud
Follow these steps carefully, and you’ll be rewarded with a perfectly risen, airy cake.
Step 1: Preparation is Key
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Preheat your oven to 180°C / 160°C Fan / Gas Mark 4.
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Line the base of your springform tin with baking parchment. Do not grease the sides. A clean, ungreased tin helps the cake mixture cling and rise upwards.
Step 2: Create the Fluffy Cloud Base
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In your first large bowl, place the egg yolks, the entire 500g tub of fat-free yogurt, vanilla extract, and your chosen sweetener.
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Whisk these ingredients together until they are smooth, well-combined, and slightly paler in colour. This is your cake base. If you’re adding lemon zest or cocoa powder, whisk it in now. Set this bowl aside.
Step 3: The Magic of the Meringue
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In your second, impeccably clean and grease-free bowl, add your egg whites and the cream of tartar. Any trace of grease or yolk can prevent the whites from whisking properly, so ensure your bowl and whisk attachments are spotless.
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Using an electric whisk on a medium-high speed, whisk the egg whites until they form stiff, glossy peaks. This is the most critical step. You’ll know they’re ready when you can turn the bowl upside down over your head (be brave!) and the mixture doesn’t move. This airy meringue is what gives the cake its incredible cloud-like texture.
Step 4: Gently Does It – The Final Combine
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Take a large spoonful of the whisked egg whites and fold it gently into the yogurt and egg yolk mixture. This first addition loosens the base, making it easier to incorporate the rest without knocking out the air.
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Now, carefully add the remaining egg whites to the bowl. Using a spatula, use a gentle, folding motion—cutting through the middle and turning the mixture over—to combine everything. Do not stir or beat! You want to retain as much of that precious air as possible. The final mixture should be light, fluffy, and streaky with white.
Step 5: Baking to Perfection
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Pour the combined mixture into your prepared springform tin. Gently smooth the top with the spatula.
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Place it in the centre of the preheated oven and bake for 25-30 minutes. The cake should be a deep golden brown on top, feel firm to the touch, and have risen significantly.
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Crucial Tip: Once baked, turn the oven off but do not open the door. Leave the cake inside with the oven door closed for at least 1 hour. This gradual cooling process prevents the cake from collapsing dramatically, helping it set its structure.
Step 6: The Grand Reveal
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After the hour is up, carefully remove the cake from the oven. It will have sunk a little in the middle—this is completely normal and creates a perfect well for fruit or yogurt!
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Run a sharp knife around the edge of the tin to loosen it, then release the springform clasp.
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Allow the cake to cool completely on a wire rack before slicing. It will be delicate, so handle with care.
Serving & Storing Your Masterpiece
This cake is delicious served simply as it is, but here are some ideas to elevate it:
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Classic: Serve a generous slice with a dollop of fat-free yogurt and a scattering of fresh berries.
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Fruity Compote: Gently heat a handful of frozen berries with a splash of water and a teaspoon of sweetener to create a warm, Syn-free sauce to drizzle over the top.
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Tropical Twist: Top with chopped mango, pineapple, and passionfruit for a taste of sunshine.
Storage Instructions:
Due to its high moisture content, this cake is best stored in the refrigerator. Keep it in an airtight container for up to 2 days. The base may become slightly more moist, but it will still be delicious. We do not recommend freezing this cake.
The Nutritional Breakdown: Goodness in Every Bite
This is where the Cloud Cake truly shines. It’s a treat you can enjoy with absolute peace of mind.
Approximate Nutritional Information (Per Slice, based on 6 servings):
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Calories: ~85 kcal
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Protein: 9g
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Carbohydrates: 6g
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of which sugars: 4g (natural from the yogurt)
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Fat: 2.5g
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of which saturates: 0.8g
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Fibre: 0g
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Sodium: 80mg
The “Why It Works”:
This nutritional profile is a weight-loss winner. It’s high in protein from the eggs and yogurt, which helps keep you feeling full and satisfied. It’s low in carbohydrates and free from added sugars, relying on natural sweetness. The minimal fat content comes purely from the egg yolks, making it a genuinely fat-free bake. It’s a dessert that nourishes your body while delighting your senses.

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