Guinness cupcakes with Bailey's frosting

This cupcake is by blogger Suzy Bakes, where you can get the recipe. She writes:

The original (and many subsequent) recipe calls for a chocolate whiskey ganache, but since I was making these for coworkers, I figured I’d leave the Jameson for our happy hour. Even with just Guinness and Bailey’s, by the time these were devoured, my coworkers had dubbed them “boozecakes”. Next time, I’ll definitely fill these with ganache, and decide whether or not I want my recipients to be hammered.