Preheat oven to 350. Line two muffin tins with cupcake liners and set aside.
In a pot or large sauce pan, simmer the beer and butter on medium until butter is completely melted.
Add cocoa powder and chocolate chips and stir until your mixture smooth. Take off heat and set aside to cool.
In a large bowl, stir eggs and yogurt together until smooth. Slowly add chocolate mixture.
Add dry ingredients and stir until well combined.
Bake for 15 minutes. Remove from oven and allow to cool on racks.
In a large sauce pan, melt chocolate chips, cream, and butter on medium-low. Stir until smooth. Add your whiskey, stir, then remove from heat and set aside to let mixture cool/thicken.
While your ganache is cooling, scoop a hole into the center of each cupcake with a cupcake corer, apple corer, or spoon.
Fill holes to the brim with thickened ganache.
In another large bowl, cream together butter, Baileys, and powdered sugar. Spoon frosting into a pastry bag and pipe it generously on top of each filled cupcake.
Enjoy!
Recipe by Just Putzing Around the Kitchen at https://www.justputzing.com/2012/03/boozy-irish-cupcakes.html