To prepare a chocolate beer cupcakes with whiskey filling and irish cream icing recipe, first you need to prepare your ingredients. First, you will need your flour, baking powder, sugar, salt, and cocoa powder. Then, add your wet ingredients to the dry ingredients and mix until everything is combined. Next, pour your batter into cupcake liners and bake for 18 to 20 minutes or until the toothpick inserted in the center comes out clean.