This gluten-free rice flour sponge cake is a perfect example of how modern culinary approaches can transform classic baking into a lighter, more accessible treat. The rice flour gives the batter a remarkably airy, almost weightless texture that stands apart from its wheat-based counterpart with its delicate fragility. A touch of cocoa adds depth to the base, while the frosting made from fresh strawberries and smetana (sour cream) fills the dessert with a vibrant, summery flavor. The flaxseeds in the frosting do more than just add a healthy dose of fiber; they also help achieve a perfectly thick consistency without the need for excess sugar or heavy starches.
The delicate and aromatic rice flour sponge cake is ready! Be sure to let it chill in the fridge for the perfect flavor.
Ingredients for the sponge roll
- 3 large eggs
- 90 g caster sugar
- 90 g rice flour
- 15 g cocoa powder
- 15 g powdered milk
- 1/2 tsp baking powder
- Vanilla powder to taste
Ingredients for the frosting
- 150 g frozen strawberries
- 150 g smetana (sour cream)
- 15 g flaxseeds
- Powdered sugar to taste
- 10 g rice flour
For decoration
- Cashews
- Candied pineapple
- Pastry confetti
How to make gluten-free rice flour sponge cake
Let’s make the cake frosting. To ensure it thickens properly by the time we assemble the cake, it’s best to start with it. Pour boiling water over the flaxseeds and let them steep for 5 minutes. Drain through a fine-mesh sieve. Finely chop fresh or frozen strawberries and place them into a tall blender cup. You will also need rice flour and a sweetener of your choice—powdered sugar, a sugar substitute, or honey. Choose whichever sweetener you prefer.
We start with the frosting so it has time to stabilize slightly while the sponge cake bakes.
Add rich, thick sour cream to the strawberries, along with the soaked flaxseeds, powdered sugar, and rice flour. Blend the frosting with an immersion blender for a few minutes until completely smooth. Transfer the finished frosting to the refrigerator to chill.
Blend the mixture until completely smooth so the flaxseeds and berries are evenly distributed.
Now, let’s prepare the sponge batter. Pour the granulated sugar into a large mixer bowl and crack in the eggs. Add vanilla powder to taste. Mix briefly and let it sit for a couple of minutes so the sugar begins to dissolve.
Combine the eggs, sugar, and vanilla. It is important to let them sit for a few minutes before whipping.
In a separate bowl, whisk together the dry ingredients: rice flour, powdered milk, cocoa powder, and baking powder. Feel free to add a pinch of ground cinnamon if you like.
Thoroughly mix the dry ingredients to ensure the baking powder and cocoa are evenly distributed.
Whip the eggs and sugar on high speed for about 10 minutes until the mixture becomes pale, fluffy, and voluminous. The sugar granules should dissolve completely.
The eggs should turn into a thick, pale foam—this is the key to an airy gluten-free sponge cake.
Next, fold the batter using a spatula or a large spoon. Sift the dry ingredients into the egg mixture in small batches, folding gently in circular motions to keep the air in.
Fold the flour mixture into the eggs in small batches, mixing gently with a spatula to keep the batter voluminous.
The finished batter will be airy, smooth, and completely lump-free.
A proper batter should be smooth, light, and completely free of any visible flour lumps.
Line a baking sheet with parchment paper or a silicone baking mat, and lightly spray it with cooking oil. Pour the batter onto the sheet and spread it out evenly.
Spread the batter evenly across the entire surface of the baking sheet so the cake layer bakes uniformly.
Bake for 12 minutes at 180°C (350°F). Make sure to preheat your oven well in advance so it reaches the target temperature by the time the batter is ready.
The sponge bakes quickly, so keep an eye on it to prevent it from drying out in the oven.
As soon as the sponge comes out of the oven, roll it up tightly along the short edge, carefully peeling away the parchment paper as you go. The sponge is incredibly delicate, so use a wide knife or a spatula to help guide it.
Roll the sponge layer immediately after it comes out of the oven while it is still highly flexible.
Unroll the cooled sponge and generously spread the strawberry frosting evenly over the surface. Reserve a small amount of the frosting for decorating the outside.
Spread the frosting generously, but reserve a small amount for the final coating on top of the cake.
Roll the sponge back up tightly, then spread the remaining strawberry frosting over the top.
Once the roll is formed, coat it with the remaining frosting for extra moisture and flavor.
Decorate the cake roll with chopped cashews, leftover sponge crumbs, finely diced candied pineapple, and a sprinkle of sugar sprinkles. Place the finished cake in the refrigerator for a few hours to allow the flavors to meld and the sponge to soak up the moisture.
The final touch is decorating with nuts and sprinkles. Now the cake needs some time to rest in the cold.
For the best experience, serve this finished rice flour sponge cake chilled, garnished with a handful of crushed cashews or brightly colored candied fruits to create a lovely textural contrast. If you want to give the dessert a more festive touch, pair it with a scoop of vanilla bean ice cream or a light fruit coulis. This cake roll makes a wonderful companion to a cup of fragrant herbal tea or strong coffee.
To keep the sponge tender and moist, store it in the refrigerator tightly wrapped in plastic wrap or placed in an airtight container. If you feel like experimenting, try swapping the strawberries for blackcurrants or raspberries—the tartness of wild berries beautifully highlights the rich chocolate notes. The real secret to the success of this dessert lies in thoroughly whipping the eggs, which guarantees the batter will rise perfectly without relying on heavy leavening agents.
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