Remove 1 pouch Krusteaz Professional Ready to Bake Sweet Cream Vanilla Cake & Muffin batter from refrigerator. No slacking required.
Prepare 16x12x1-inch half-sheet pan by lightly greasing. If using a pan extender (recommended), lightly grease the sides of the pan extender.
Cut open one end of the pouch and squeeze all of batter into a bowl. Add 2 Tbsp. whiskey.
Pour batter into prepared pan and spread batter evenly.
For convection oven, bake at 300°F at low fan speed for 25-30 minutes. Allow cake to cool completely before removing from pan.
Cut cake into 1-inch cubes and set aside. To prepare the frosting: In a bowl beat the mascarpone, cream cheese, confectioners sugar, heavy cream, vanilla, whiskey and salt together for about 1 minute, until fluffy.
For the glaze: Place butter, heavy whipping cream, sugar and brown sugar into a small pot over medium heat. Bring to a boil and simmer for 2 to 3 minutes.
Remove from heat and allow to cool slightly, then add whiskey. Stir until the consistency is slightly thick, but also pourable.
To assemble: drizzle glaze inside a whiskey glass covering the bottom and working your way up the sides of the glass. Then stack 5-6 cake cubes, pipe frosting and drizzle more glaze. Decorate with a sprig of mint or shamrock if you’re lucky enough to find it!