Angel Cake

Directions

1. 1
   Bring egg whites to room temperature.
2. 2
   Sift powdered sugar and flour together 3 times.
3. 3
   In a large bowl beat egg whites, cream of tartar, and vanilla with electric mixer on medium speed till soft peaks form.
4. 4
   Gradually add sugar, about 2 tbs at a time, beating till stiff peaks form.
5. 5
   Sift about 1/4 of the flour mixture over beaten egg whites; fold in gently.
6. 6
   Repeat, folding in remaining flour mixture by fourths.
7. 7
   Pour into an ungreased tube pan (10 inch).
8. 8
   Bake on the lowest rack in a 350F oven for 40-45 minutes or till top springs back when lightly touched.
9. 9
   Immediately invert cake (leave in pan); cool thoroughly.
10. 10
    loosen sides of cake from pan; remove cake.