Chocolate Sponge Cake

• 6 eggs,
• 1/2 cup orange juice
• 1 teaspoon vanilla extract
• 1-1/2 cups sugar, divided
• 1 cup all-purpose flour
• 1/3 cup baking cocoa
• 1/2 teaspoon cream of tartar

1. Let eggs stand at room temperature for 30 minutes. In a large bowl, beat egg yolks until slightly thickened and lemon-colored, about 5 minutes. Stir in orange juice and vanilla until combined. Gradually beat in 1 cup sugar on low speed, about 2 tablespoons at a time, beating well after each addition. Beat on high until mixture thickens and nearly doubles in volume. Combine the flour and cocoa. Fold a fourth of the flour mixture into the yolk mixture. Repeat with remaining flour mixture; set aside.
2. In a large bowl and with clean beaters, beat egg whites and cream of tartar in medium speed until soft peaks form. Gradually beat in remaining sugar, about 1 tablespoon at a time, on high until stiff glossy peaks form and sugar is dissolved. Fold a fourth of the egg whites into the yolk mixture; fold in remaining whites.
3. Pour into an ungreased 10-in. tube pan. Bake at 325u0b0 for 55-60 minutes or until top springs back when lightly touched. Immediately invert pan; cool completely. Run a knife around sides and center tube of pan; remove cake.

eggs, orange juice, vanilla, sugar, flour, baking cocoa, cream of tartar

Taken from www.tasteofhome.com/recipes/chocolate-sponge-cake/ (may not work)