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Ingredients

• ✓ vanilla rum
• cornstarch
• all-purpose flour
• baking powder
• baking soda
• butter
• white sugar
• egg yolk
• lemon zest
• vanilla extract
• lemon extract
• dulce de leche
• coconut

Instructions

1. 1 Preheat the oven to 350 degrees F (175 degrees C). Line baking sheets with parchment paper.
2. 2 Whisk cornstarch, flour, baking powder, and baking soda together; set aside.
3. 3 Beat butter and sugar together in a large bowl with an electric mixer until light and fluffy. Beat in 2 egg yolks, one at a time, beating well after each addition; beat in third yolk along with lemon zest, vanilla rum, vanilla extract, and lemon extract. Gently fold in cornstarch mixture with a spoon, making a crumbly dough, until cohesive enough; press into a ball. Wrap dough in plastic wrap; chill 30 to 60 minutes.
4. 4 Roll dough out, using as little flour as possible, until about ¼-inch thick. (The dough will have an unusual consistency.) Cut dough using a small round cookie cutter. Continue pressing dough together, rolling, and cutting until all dough is used. Place cookies spaced ½-inch apart onto the prepared cookie sheets.
5. 5 Bake in the preheated oven until set but not browned, 7 to 10 minutes. Transfer cookies immediately to a wire rack to cool.
6. 6 Spread 1 teaspoon dulce de leche onto underside of 1 cooled cookie; sandwich with second cookie until caramel oozes out sides. Roll sides in shredded coconut. Repeat with remaining cookies, dulce de leche, and coconut.

By Christina-Chrisi Marvasi