In base of Whip N Mix Chef, add eggs, margarita mix, oil, half of lime zest and mix on gear I until fully combined.
Add cake in two increments, and switch to gear
II. Continue mixing until smooth.
Pour batter in Silicone Muffin Form, filling up to 2/3 full, and bake for 12-14 minutes or until toothpick inserted in center comes out clean. Let cool completely.
Make buttercream by mixing, on gear I, butter,
lime juice and remaining lime zest until smooth.
Switch to gear II and add powdered sugar ½ cup
at a time until smooth.
Add heavy cream and continue turning handle on
gear II until creamy.
Decorate cupcakes with buttercream, garnish as
desired and serve.
