3. Make the devil's food cake: Heat oven to 350°. Grease a 10" round cake pan with shortening and dust with flour to coat; shake out excess flour and set pan aside. In a medium bowl, whisk together cake flour, baking soda, salt, and baking powder; set flour mixture aside. In another medium bowl, whisk the coffee and cocoa powder until smooth; set coffee mixture aside. In a large bowl, beat the shortening, sugar, vanilla, and eggs with a handheld mixer on medium speed until pale and fluffy, 2 minutes. Alternately add the flour mixture and the coffee mixture to the bowl in 3 stages, beating to combine after each addition. Pour the batter into the prepared cake pan and bake until a toothpick inserted into cake comes out clean, 30-35 minutes; transfer to a rack and let cool completely.