Preheat the oven to 180°C (355°F). Line a 30 x40 cm pan with parchment paper.
⚙ Preheating the OvenOvenBaking sheetParchment paper
💡Put things in the oven only once it's reached temperature, after the heating light has gone off: an oven that hasn't reached temperature changes baking times, and the bake burns outside or stays underbaked.
2
Whip the egg whites to a foam. Gradually add the sugar, whipping constantly, to stiff, glossy peaks.
⚙ WhippingBowlHand mixerorStand mixerorWhisk
3
Fold the vinegar, cornstarch and vanilla into the meringue gently.
⚙ FoldingSilicone spatula
4
Spread on the baking sheet.
Baking sheetOffset spatula
5
Bake 15–18 minutes, until the meringue is firm and slightly soft.
OvenBaking sheet
6
Flip the meringue onto parchment paper and let cool 5 minutes.
Parchment paper
For the Cream Filling
7
Whip the cold cream on medium speed, until it starts to thicken.
⚙ WhippingBowlHand mixerorStand mixer
💡Cold cream whips quickly and holds firm: warm cream won't hold air. Stop when the peaks are firm, before it turns grainy.
💡Whip cream very cold, in a chilled bowl with chilled beaters, and stop when it holds firm: overwhipping turns it grainy and buttery.
8
Add the powdered sugar and keep whipping on high speed to firm peaks.
Hand mixerorStand mixer
To assemble
9
Spread the cream over the layer, arrange the strawberries and blueberries over it and roll into a roulade.
Offset spatula
💡Spread the cream only on a completely cooled cake, and leave a bare border at the end: the cream gets pushed there as you roll instead of spilling out.
10
Serve cold.
253calories
3 gprotein
32 gcarbs
12 gfat
● protein 5%● carbs 51%● fat 44%
Per serving (120 g), of 8 servings
For the Sponge Cake · For the Cream Filling · To assemble ·
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Oven· 💡 Workaround, changes the dish: Toaster oven (Fits one small pan; good for small batches) · Air fryer (Small batches only, no runny batters) · Pot (Only for covered stews on the stovetop, no browning on top)
Baking sheet· Also works: Baking pan (None) · Disposable pan (None)
Offset spatula· Also works: Spreading knife (Spreading knife) · Spoon / teaspoon (regular) (Back of a spoon)
Bowl· Also works: Pot (None)
Silicone spatula· Also works: Wooden spoon (Scrapes less well) · Spoon / teaspoon (regular) (None)
Hand mixer or Stand mixer· one of them
🧻 Consumables: Parchment paper
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