Butter
2 cups sugar
1 3/4 cups cake flour
2 tablespoons cornstarch
1 teaspoon baking soda
3/4 teaspoon salt
2/3 cup unsweetened cocoa
= (preferably Dutch process)
1 teaspoon instant coffee
3/4 cup boiling water
1/2 cup sour cream
1 teaspoon vanilla extract
4 large egg whites
= (you may want to save yolks to use in
the frosting)
14 tablespoons unsalted butter - (1 3/4 sticks)
=== CREAMY DOUBLE-CHOCOLATE FROSTING ===
1/2 cup egg substitute
= (or 4 egg yolks [left over from cake],
with enough milk added to equal 1/2 cup,
plus additional milk, if necessary)
1/2 cup unsweetened cocoa
1/2 teaspoon instant coffee
1 teaspoon vanilla extract
1/4 teaspoon salt
8 tablespoons unsalted butter - (1 stick)
4 ounces unsweetened chocolate
3 cups confectioners' sugar
= (sifted if it contains hard lumps)
4 teaspoons light corn syrup
=== SPECIAL EQUIPMENT ===
2 eight-inch cake pans
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