Directions

• Preheat the oven to 350 degrees. Line cookie sheet with parchment or silpat.
• In a small bowl, whisk together flour, baking powder, and salt. Set aside.
• In the bowl of a stand mixer, combine sugar, lime zest, and lemon zest. Use your fingers to rub the zest into the sugar until it is moist and aromatic.
• Add butter to the citrus-infused sugar and mix with a paddle attachment until light and fluffy, about 2 minutes. Add eggs, one at a time, until each is well-combined. Add vanilla extract.
• Add the flour mixture gradually, beating on medium-low speed until just incorporated.
• Put powdered sugar in a small bowl and set aside. Using your hands or a spoon, form 2-inch balls of dough, then roll in the powdered sugar and toss to coat.
• Transfer dough to cookie sheets, about 2-inches apart.  Bake for 10-12 minutes, until a light golden color and cracked surface appears.
• Cool in cookie sheet for 5 minutes, then transfer to a wire rack to cool completely.