Genoise Sponge

Ingredients

• 6 large egg whites
• 0.5 teaspoons cream of tartar
• 0.75 cups white sugar
• 1 cup butter , softened
• 1 cup white sugar
• 6 large egg yolks
• 2 cups sifted cake flour
• 0.5 teaspoons baking powder
• 0.5 teaspoons salt

Instructions

1. 1

   Preheat the oven to 350 degrees F (175 degrees C). Grease a 10-inch cake pan.

2. 2

   Beat egg whites and cream of tartar until soft peaks form. Add 3/4 cup sugar gradually, beating until very stiff.

3. 3

   Cream butter and 1 cup sugar in a large bowl with an electric beater until light in color. Add egg yolks, and beat until thick and fluffy. Sift flour, baking powder, and salt over batter; fold in. Gently fold in egg whites. Pour batter into prepared pan.

4. 4

   Bake in the preheated oven until a toothpick inserted into the center comes out clean, about 50 to 60 minutes. Cool in the pans for 10 minutes, then remove to a wire rack to cool completely.