- pre-heat oven to 350 F
- in a large bowl beat butter and sugar until fluffy
- beat in eggs, one at a time
- beat in vanilla
- sift flour, salt, and baking powder together in a separate bowl
- mix Jager, RedBull and milk together
- alternate adding dry and wet ingredients to the butter/ sugar/ egg mixture
- bake for 20-22 minutes, or until toothpick inserted in middle comes out clean
- cream butter
- add 1/2 of the powdered sugar, beat
- add vanilla and 1/2 of the Jager, beat until blended.
- add remaining powdered sugar and Jager, beat until smooth.
- cream butter
- add 1/4 of the powdered sugar, beat
- add 1/4 of the RedBull, beat until blended.
- alternate gradually adding remaining powdered sugar and RedBull, beat until smooth.