Ingredients

  • 10 large egg whites, at room temperature (1 1/2 cups)
  • 1 1/2 teaspoons cream of tartar
  • 3/4 cup granulated sugar
  • 1/4 teaspoon pure vanilla extract
  • 1 cup cake flour
  • 3/4 cup confectioners' sugar
  • 1/4 teaspoon salt
  • 2 pints strawberries, sliced
  • 2 pints raspberries
  • 1 pint blackberries
  • 1/2 cup granulated sugar
  • 3 tablespoons fresh lemon juice

Method

  • Preheat the oven to 350.
  • In the bowl of a standing electric mixer, beat the egg whites at medium-high speed until frothy.
  • Add the cream of tartar and beat until firm peaks form.
  • Add the granulated sugar, 2 tablespoons at a time, beating for 10 seconds before adding more.
  • Beat in the vanilla.
  • Once all of the sugar has been added, beat the whites at high speed until stiff, about 4 minutes.
  • In a medium bowl, whisk the cake flour with the confectioners' sugar and salt.
  • Sift the dry ingredients over the beaten whites in 3 batches, folding gently with a large spatula until incorporated.
  • Spoon the batter into an ungreased 10-inch angel food cake pan (do not use nonstick).
  • Bake for 40 minutes, until the cake is risen and golden.
  • Invert the cake in the pan onto a bottle neck and let cool.
  • In a large saucepan, combine the berries, sugar and lemon juice and simmer until the juices are released, about 10 minutes.
  • Let cool slightly.
  • Using a knife, loosen the cake from the pan and remove the side of the pan.
  • Loosen the cake from the pan bottom and the tube.
  • Transfer the cake to a plate.
  • Slice the cake and serve with the warm compote.