Deluxe Angel Food Cake

Recipe is from Mazie.

1 2/3 cups egg whites (about 12 medium eggs)
1 cup plus 2 TB sifted cake flour
¾ cup sifted granulated sugar
½ tsp salt
1 ½ tsp cream of tartar
1 cup sifted granulated sugar
1 tsp vanilla
¾ tsp almond extract

About 1 hour ahead, set out egg whites. Heat oven to 375 degrees. Sift flour with ¾ cup sugar 5 times. In large mixer bowl, beat whites and salt with electric mixer at high speed till foamy; add cream of tartar; beat till whites are stiff and stand in peaks (about 2 ½ minutes); rapidly sprinkle in, while beating, 1 cup sugar; beat only till sugar is blended (about 1 minute); scrape bowl toward beaters then up and over, with rubber spatula. Add extracts. Turn mixer to low speed; sprinkle in sifted flour evenly and quickly, beating just to blend (about 1 ½ minutes). Gently scrape bowl toward beaters, then up and over, using folding motion. Gently push batter into ungreased 4-inch deep 10-inch tube pan. With spatula, cut complete square through batter without removing spatula. Bake 35 minutes or until done. Immediately invert pan; leave until cold; then remove cake.