A classic vanilla sponge cake with homemade raspberry jelly filling. Serve with a dollop of whipped cream and enjoy with a cup of tea or coffee.
For the Filling:
Mix all ingredients together in a large saucepan. Bring to a boil. Cook, stirring occasionally, until mixture is thick and nearly reduced in half, about 9-10 minutes. Remove from heat, transfer to a bowl and place in fridge until chilled.
For the Roll:
Heat oven to 350°F.
Spray a Sweet Creations 12x17” baking pan with nonstick baking spray. Line with parchment, then spray parchment generously with baking spray, making sure to coat the edges of the pan. Set aside.
Place egg whites and 1/2 cup of sugar in a stand mixer fitted with the whisk attachment. Beat until stiff peaks form. Transfer egg white mixture to a bowl.
Return mixer to the stand (no need to clean the bowl) and add remaining 1/2 cup of sugar, egg yolks, apple cider vinegar and vanilla to bowl. Beat for 4-5 minutes on high, until light colored and whippy. Slowly add egg white mixture into mixer, beating just until incorporated.
In a medium bowl, whisk or sift flour, cornstarch, baking powder and salt together. Add half of this mixture to the egg mixture, beat just until combined, then add remaining flour mixture to bowl, beat until incorporated. Do not over-mix.
Spread batter into the prepared baking sheet. Tap slightly to even the batter out in the pan. Bake at for 13-17 minutes, or just until center of cake springs back when touched lightly.
While cake is baking, lay a thin dish towel flat on the countertop and sprinkle generously with 1 cup powdered sugar. As soon as the cake comes out of the oven, invert atop dishtowel. Gently remove parchment paper. Starting with the narrow end, slowly roll the cake up with the towel. Allow cake to cool completely in rolled up towel. Once cooled, gently unroll the cake. Spread jelly filling across the top, leaving a 1/2” border. Gently roll the cake up again, this time tightly, and without the towel. Cover with plastic wrap and refrigerate for at least 2 hours, ideally overnight. Just before serving, use cheesecloth or a fine-mesh strainer to dust with 1/2 cup powdered sugar.
Swap in any frozen berry for the raspberries in this recipe.