Ingredients

  • Cake
  • 12 egg whites, at room temperature
  • 1/4 teaspoon fine sea salt
  • 1 1/4 teaspoons cream of tartar
  • 1 teaspoon pure vanilla extract
  • 1/2 teaspoon lemon juice
  • 1 tablespoon lemon zest
  • 1 1/2 cups powdered sugar
  • 1 cup cake flour
  • Sauce
  • 1 cup plain yogurt
  • 1/4 cup honey
  • 1 tablespoon lemon juice

Method

  • For the cake: Place an oven rack in the center of the oven. Preheat the oven to 350 degrees F.
  • In a large mixing bowl, combine the egg whites, salt and cream of tartar. Using an electric hand mixer, beat on medium speed until frothy.
  • Add the vanilla extract, lemon juice, and lemon zest. Beat on high speed until soft peaks form, about 2 to 4 minutes.
  • Gradually add the sugar and beat until the mixture forms stiff peaks, about 2 minutes longer.
  • Sprinkle the flour over the egg white mixture.
  • Using a spatula, carefully fold in the flour until incorporated.
  • Spoon the batter into an ungreased 10-inch nonstick angel food cake pan.
  • Bake for 30 to 40 minutes until the top is browned and a skewer inserted halfway between the inner and outer wall of the pan comes out clean.
  • Invert the pan on a wire rack to cool completely, about 1 hour.
  • For the sauce: In a small bowl whisk together the yogurt, honey, and lemon juice until smooth.
  • Using a spatula, loosen the cake around the sides and middle. Release the cake and place on a serving plate.
  • Cut into slices and drizzle with the sauce.