Step 1

Prepare the Cake: Preheat the oven to 375°F (190°C) with a rack in the center position. Lightly grease a half sheet pan (roughly 18-inch long x 13-inch wide) with baking spray, line with parchment paper, then lightly grease the paper with baking spray. Set aside.

Step 2

Place the egg whites in the bowl of a stand mixer, fitted with a whisk attachment. Whisk over high speed until light and foamy. Slowly sprinkle in ½ cup (100 grams) granulated sugar and continue whisking over medium-high speed until the egg whites have reached medium peaks. Note: If the whisk attachment is lifted from the mixture, the tip of the peak of egg whites should tip over but still hold. Carefully transfer to a large, clean mixing bowl and set aside until ready to use.

Step 3

Wipe the stand mixer bowl clean (don’t worry if there is still some residue) and combine the egg yolks, the remaining ½ cup (100 grams) granulated sugar, and vanilla extract. Using the whisk attachment, beat over high speed until ribbony and pale yellow, about 3 minutes. Add about a third of the egg whites to the beaten yolk mixture, and gently combine together using the whisk attachment. Repeat with two more additions of the beaten egg whites, gently folding them in with a large spatula. Be careful not to deflate the egg whites by over mixing.

Step 4

Sprinkle roughly a quarter of the sifted cake flour onto the sponge batter, and fold in gently with a spatula. Repeat until all of the flour has been incorporated and the mixture is smooth and fluffy. Scrape the bottom of the bowl to ensure all of the ingredients have been incorporated evenly. Transfer the batter onto the prepared sheet pan and spread into an even layer using an offset spatula (the batter should fill the entire pan).

Step 5

Bake for 10 to 12 minutes, or until light golden in color. As the cake is baking, lay a clean kitchen linen (the long edge of the linen facing you) on your countertop and using a fine-meshed sieve, dust generously with confectioner’s sugar.

Step 6

As soon as the cake is removed from the oven, loosen the edges of the cake from the pan with a knife if necessary. Carefully and quickly invert the sheet pan (long edge of the pan facing you) in one quick motion and cake onto the sugar-dusted linen. Very carefully peel off the parchment paper and discard. While the cake is still warm, roll the cake and linen, narrow end to narrow end, into a tight spiral. The linen should be rolled with the cake, so that the cake does not touch itself as it is rolled. Cool on a wire rack, in the linen, until the cake is room temperature.

Step 7

Prepare the Cake Filling: Note: Depending on how thick your raspberry preserves are, you may need to thin them down with up to a tablespoon of water (whisk to combine). You want the preserves to be relatively thin before spreading on the cake – if too thick, you will damage the cake as you are spreading it. Unroll the cake so that it lays completely flat. Using an offset spatula, spread the raspberry preserves into a very thin layer on the cake.

Step 8

In the bowl of a stand mixer, fitted with a whisk attachment, combine the heavy cream, powdered sugar, and vanilla extract. Beat until fairly thick, starting at slow speed and increasing to medium high, and medium peaks form. In a small bowl, lightly mash one package of raspberries. Gently fold the mashed raspberries into the cream.

Step 9

Spread the raspberry cream into an even, thin layer on the cake, leaving about a ¾-inch border on all sides. Slice the second package of raspberries in half and press them gently into the raspberry cream layer. Carefully re-roll the cake (without the linen), narrow end to narrow end, into a spiral. Place the cake seam-side down on a long serving platter, cover tightly with plastic wrap, and refrigerate for at least one to two hours (or until just before assembly and serving).

Step 10

Assemble the Cake: In the bowl of a stand mixer, fitted with a whisk attachment, combine the heavy cream, powdered sugar, and vanilla extract. Beat until fairly thick, starting at slow speed and increasing to medium high, and medium peaks form. Using an offset spatula, spread the cream into an even layer onto the outside of the cake.

Step 11

Top the cake with the remaining 6-ounce package of raspberries. Cover lightly with plastic wrap and refrigerate until ready to serve. Just before serving, dust the cake and berries with confectioner’s sugar and serve immediately, using a serrated knife to gently slice the cake into rounds.