What You Do:

1. Preheat oven to 350 degrees. Line 2 or 3 large baking sheets with parchment paper or Silpat. In a medium bowl, whisk together flour, baking powder, and salt.



2. Using a stand or hand mixer, beat margarine until light and fluffy. Add powdered sugar, brown sugar, rum, and peppermint extract and beat until combined. Mix in flour mixture, 1/2 cup at a time, then add lime zest and chocolate chips. Mix until combined.



3. In a small bowl, combine sugar and lime zest garnish. Scoop 1 rounded tablespoon of dough at a time, and roll each scoop in sugar-zest mixture. Place on prepared baking sheets, rounded side up, leaving about 2 inches between each scoop. For crisper cookies, gently flatten dough with palm of your hand. Bake for about 12 minutes, or until edges are lightly browned. Let cool on baking sheets.

