- Preheat oven to 350 degrees F
- Melt butter, allowing it to turn golden brown
- Whisk sugar and cocoa powder together
- Next add melted butter, Kahlua, and Bailey’s to the butter, whisk until smooth
- Bring to room temperature, whisk in eggs, vanilla, and sour cream
- Whisk baking soda, baking powder, salt, and flour together
- Gradually add this to butter/cocoa/ booze mixture, beating on low until well combine
- Stir in chocolate chips
- Fill cupcake liners 1/3 -1/2 full, drop in 2 KitKat halves, finish filling cupcake liners to 2/3 -3/4 full
- Bake for 15-20minutes, or until toothpick inserted in middle comes out clean
- Cream butter
- Add 2 cups powdered sugar, Kahlua, and Bailey’s, beat until smooth
- Gradually add remaining powdered sugar
- Frost cupcakes, then sprinkle chopped KitKats over tops