Here's a recipe, if you want to make it from scratch

AMISH ANGEL FOOD CAKE FROM SCRATCH

1 1/2 cups egg whites at room temperature
1 1/4 cups sifted cake flour
1/2 cup sifted sugar
1/4 tsp. salt
1 1/4 tsp. cream of tarter
1 tsp. vanilla
1/4 tsp. almond extract
1 1/3 cups sifted sugar

Measure flour and the ½ cup of sugar. Sift together 4 times. Combine the egg whites with salt, cream of tarter. vanilla and almond extract. Beat until moist peaks form. Add the remaining sugar in 4 additions, beating until blended after each addition. Sift in the flour mixture in 4 additions, folding in with a large spoon each time, turning bowl often. Place in ungreased 10" tube pan. Bake at 375° for 35-40 minutes. Cool upside down on cooling rack. Loosen and remove cake.

Variation: If a chocolate cake is desired, add 2 Tablespoons of cocoa.