Chocolate Angel Food Cake - cooking recipe

Ingredients

3/4 c. cake flour, sifted 4 times
1 1/3 c. egg whites
1 1/3 tsp. cream of tartar
1 1/4 tsp. vanilla
1/2 c. cocoa
1/4 tsp. salt
1 1/2 c. sifted sugar

Preparation

Beat egg whites and salt until foamy.
Add cream of tartar. Beat until stiff.
Fold in sugar and flavoring.
Sift a small amount of flour over the mixture and fold in carefully.
Continue until all is used.
Pour into an angel food cake pan.
Bake 1 hour at 275\u00b0.
After first 30 minutes, increase heat to 325\u00b0 and bake 30 minutes longer.