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, 0.4 oz mint flavor and 0.4 oz rum flavor. Pipe prepared buttercreme onto donuts and garnish with fresh lime zest.
Bismark, Bismarck, Berliner, Lime, Rum, Boozy, Alcohol, Boozy, Mint, Doughnut