Today I tried another recipe of my cupcake book. (Cupcakes from Christina Richon/ It's in German and a book of the GU kitchen guidebooks).
Cupcakes with Coffee and real vanilla.
Theres instant coffee inside the dough and the baked cupcake is soaked with a mixture of espresso, real vanilla and sugar. I used way less coffee to soak the cakes than adviced in the book. I i think it has been the right decision..