Key lime slice cookies

Ingredients:

• 2 cups premium flour
• 0.5 tsp baking powder
• 1/4 teaspoon salt
• 110 g unsalted butter at room temperature
• 4 tbsp. cream cheese at room temperature
• 0.5 cup + 1/3 cup granulated sugar
• 1 tbsp + 1.5 tsp finely grated lime zest (from about 5 limes)
• 1 tbsp freshly squeezed lime juice
• 1 large egg
• 1.5 tsp green decorative sugar

Preparation:

1. In a medium bowl, combine the flour, baking powder, and salt. In a large bowl, beat the butter, cream cheese, 1/2 cup granulated sugar, and 1 tablespoon lime zest with a mixer on medium-high speed until light and fluffy, about 3 minutes. Add the lime juice and egg until fully incorporated. Reduce the mixer speed to medium-low, add the flour mixture, and mix until smooth.
2. Place two 12x16-inch pieces of parchment paper on a work surface. Divide the dough in half and place each half on a sheet of parchment; shape each piece into a rough log. Fold the parchment over the dough; using a ruler, shape the dough into a 1x12-inch log. Wrap each log in parchment and refrigerate until firm, at least 3 hours.
3. Position oven racks in the upper and lower thirds of the oven; preheat oven to 375°F (190°C). Line 2 baking sheets with parchment paper.
4. Combine the remaining 1/3 cup granulated sugar with 1.5 teaspoons lime zest and green sugar on a sheet of parchment paper. Unroll the dough and roll the logs in lime sugar to coat completely. Cut into 1/4-inch-thick squares; arrange them 1 inch apart on the prepared baking sheets.
5. Bake, rotating the baking sheets halfway through, until the cookies are golden brown around the edges, about 12 minutes. Let cool on the baking sheets for 5 minutes, then transfer to wire racks to cool completely.