Make up the donut mix according to manufacturer’s instructions then roll out and cut into bismarks. Fry and let cool completely. Fill donuts with key lime filling. Mix together 2 pounds buttercream, 0.4oz mint flavor and 0.4oz rum flavor. Pipe prepared buttercreme onto donuts and garnish with fresh lime zest.
Bismark, Bismarck, Berliner, Lime, Rum, Boozy, Alcohol, Boozy, Mint, Doughnut