When I was married in 1944, I could barely boil water. My dear mother-in-law taught me her specialty - making the lightest angel food cakes ever. This chocolate version is an easy, impressive treat. For many years, it was our son's birthday cake.
When I was married in 1944, I could barely boil water. My dear mother-in-law taught me her specialty - making the lightest angel food cakes ever. This chocolate version is an easy, impressive treat. For many years, it was our son's birthday cake.
Standard angel food cake relies solely on egg whites and cake flour for its pale, ethereal structure, but incorporating baking cocoa introduces a dense element that requires careful handling. Sifting the confectioners' sugar, flour, and cocoa three times is mandatory. This process aerates the dry components and prevents heavy lumps of cocoa from deflating the whipped egg whites. Room temperature egg whites, achieved by letting them stand for 30 minutes, whip faster and hold more air than cold whites.
Cake flour contains less protein than all-purpose flour, yielding a tender crumb essential for this style of sponge. If all-purpose flour must be substituted, replace each cup with one cup minus two tablespoons of all-purpose flour plus two tablespoons of cornstarch to mimic the lower protein content. When folding the dry mixture into the meringue, add it in half-cup increments. Over-mixing deflates the trapped air, resulting in a dense, rubbery texture instead of a high-rising structure. Bake the batter in an ungreased 10-inch tube pan on the lowest oven rack at 375 degrees Fahrenheit for 35 to 40 minutes. The ungreased aluminum allows the batter to cling to the sides and climb upward.