Cool Chocolate Cream Sponge Cake References. Make for a birthday surprise that will leave everyone wanting another slice. 2 cups (440g) firmly packed brown sugar.

Set aside in the pans for 5 mins to cool slightly before turning onto a wire rack. Preheat the oven to 355 degrees f (180°c). In a medium sized bowl add in egg whites and white vinegar, and using a hand or stand mixer, whip on a medium high speed for 30 seconds until foamy.