Choco-Cinnamon Angel Cake

1 1/2 cups egg whites -- (10-12 large eggs)

1 cup cake flour -- sifted,or all-purpos

1 1/2 cups powdered sugar

3 Tbsp cocoa powder

1/2 tsp cinnamon

1 1/2 tsp cream of tartar

1 tsp vanilla

1 cup granulated sugar

- Bring egg whites to room temp. - sift flour, powd. sugar, cocoa powder, & cinnamon thoroughly. set aside. - in lg. mixing bowl, beat egg whites, cream of tartar, & vanilla with an electric mixer on med. speed till soft peaks form. - gradually add sugar, 2 Tbsp at a time, beating on high speed till stiff peaks form. - sift 1/4 of floyr mixture over beated mixture, and fold in gently. Repeat, folding remaining mixture in by fourths. - pour into ungreased tube pan. - bake on lowest rack of oven at 350 deg. for 40-45 min or till top springs back when lightly touched. - immediately invert and allow to cool