1 cup (120 g) cake flour 1 1 / 2 cups (300 g) granulated sugar, divided 12 large egg whites, at room temperature 1 1 / 2 tsp cream of tartar 1 / 4 tsp fine salt 2 tsp pure vanilla extract 1 tsp fresh lemon juice (optional) 3 cups mixed fresh berries (strawberries, blueberries, raspberries, blackberries) 1 tbsp granulated sugar (optional, for macerating berries) 1 cup cold heavy whipping cream 2 tbsp powdered sugar 1 / 2 tsp pure vanilla extract
Preheat oven to 350°F (175°C). Have an ungreased 10-inch tube (angel food) pan ready. Do not grease; the batter needs to cling to the sides to rise. Make the dry mixture: Whisk or sift the cake flour with 3/4 cup (150 g) of the granulated sugar; sift together 2–3 times to aerate. Set aside. Beat the egg whites: In a large, completely clean and dry bowl, add egg whites, cream of tartar, and salt. Beat on medium speed until foamy, about 1–2 minutes. Add sugar gradually: With the mixer running, slowly sprinkle in the remaining 3/4 cup (150 g) granulated sugar. Increase to medium-high and beat until glossy, medium-stiff peaks form (tips hold but are just slightly soft). Flavor the meringue: Beat in vanilla and lemon juice (if using) just to combine. Fold in dry ingredients: Sift one-third of the flour-sugar mixture over the meringue and gently fold with a large spatula. Repeat in two more additions, folding just until no dry pockets remain. Do not deflate the batter. Fill the pan: Spoon batter into the ungreased tube pan, smooth the top, and run a knife through the batter to pop large air pockets. Bake 35–40 minutes, until the top is golden and springs back when lightly pressed, and a skewer comes out clean. Cool inverted: Immediately invert the pan onto its feet or over a bottle and cool completely, 2–3 hours. This prevents collapse. Release the cake: Once cool, run a thin knife around the edges and center tube to loosen. Lift out and run the knife under the base to release fully. Prepare berries: If desired, toss berries with 1 tablespoon sugar and let sit 10–15 minutes to lightly macerate. Whip the cream: In a cold bowl, beat heavy cream, powdered sugar, and vanilla on medium-high until soft-to-medium peaks form. Serve: Slice the angel food cake with a serrated knife using a gentle sawing motion. Serve with a generous spoonful of berries and a dollop of whipped cream.
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