What is meant are (small) coffee cups, not coffee mugs.
Mix the flour with the baking powder. Then stir in all the ingredients. If you like, you can now fold in nuts, almonds, cherries, marzipan, etc.
The recipe is also great for marble cakes. Simply divide the dough and stir in half of the cocoa (1-2 tablespoon). Bake at 160 ° C for about 50 minutes.