Strawberry Marble Cake

Directions

1. Let egg whites stand at room temperature for 30 minutes. In a food processor, puree strawberries; strain puree and discard seeds. Set aside.
2. Sift together 3/4 cup sugar and the flour twice; set aside. Add cream of tartar and salt to egg whites; beat on medium speed until soft peaks form. Gradually beat in remaining sugar, 2 tablespoons at a time, on high until stiff glossy peaks form and sugar is dissolved. Gradually fold in flour mixture, about 1/2 cup at a time.
3. Transfer half of the batter to another bowl; fold in extracts. Fold 1/4 cup strawberry puree into remaining batter; add food coloring if desired.
4. Gently spoon batters, alternating colors, into an ungreased 10-in. tube pan. Cut through with a knife to swirl. Bake on the lowest oven rack at 350° for 45-50 minutes or until lightly browned and top appears dry. Immediately invert pan; cool completely, about 1 hour.
5. Run a knife around side and center tube of pan. Serve cake with remaining puree; garnish with whipped topping and fresh strawberries if desired.