Contest-Winning Chocolate Mint Sandwich Cookies Recipe

<ul class="ingredients-main-list"><li class="ingredients-single-item">280g all-purpose flour</li><li class="ingredients-single-item">75g unsweetened cocoa powder</li><li class="ingredients-single-item">1/2 tsp baking powder</li><li class="ingredients-single-item">1/4 tsp salt</li><li class="ingredients-single-item">225g unsalted butter, softened</li><li class="ingredients-single-item">200g granulated sugar</li><li class="ingredients-single-item">1 large egg</li><li class="ingredients-single-item">2 tsp vanilla extract</li><li class="ingredients-single-item">For the mint filling:</li><li class="ingredients-single-item">115g unsalted butter, softened</li><li class="ingredients-single-item">300g powdered sugar, sifted</li><li class="ingredients-single-item">2-3 tbsp milk</li><li class="ingredients-single-item">1 tsp peppermint extract</li><li class="ingredients-single-item">1/4 tsp vanilla extract</li><li class="ingredients-single-item">Green food coloring (optional)</li><li class="ingredients-single-item">60g mini chocolate chips or finely chopped dark chocolate (optional)</li></ul>

<ul class="equipment-main-list"><li class="equipment-single-item">Stand mixer or electric hand mixer</li><li class="equipment-single-item">5cm (2-inch) round cookie cutter</li><li class="equipment-single-item">Rolling pin</li><li class="equipment-single-item">Baking sheets</li><li class="equipment-single-item">Parchment paper or silicone baking mats</li></ul>

<ol class="no-list-style"><li class="MethodStepper"><h4 class="step-title">Step 1</h4>In a medium bowl, whisk together the flour, cocoa powder, baking powder, and salt until well combined. The cocoa powder tends to form clumps, so be sure to whisk thoroughly to create a uniform dry mixture that will distribute the chocolate flavor evenly throughout your cookies.</li><li class="MethodStepper"><h4 class="step-title">Step 2</h4>In the bowl of your stand mixer fitted with the paddle attachment (or using a hand mixer), cream the butter and sugar together on medium-high speed until light and fluffy, about 3-4 minutes. This extended creaming process incorporates air into the mixture, creating a lighter cookie texture that will still maintain its structure when filled.</li><li class="MethodStepper"><h4 class="step-title">Step 3</h4>Add the egg and vanilla extract to the butter mixture and beat until fully incorporated, scraping down the sides of the bowl as needed. The mixture should look smooth and glossy at this point.</li><li class="MethodStepper"><h4 class="step-title">Step 4</h4>With your mixer on low speed, gradually add the flour mixture to the wet ingredients until just combined. Be careful not to overmix, as this can develop the gluten in the flour and make your cookies tough rather than tender. The dough will be relatively stiff but should hold together when pressed.</li><li class="MethodStepper"><h4 class="step-title">Step 5</h4>Divide the dough in half and form each portion into a disk. Wrap each disk in plastic wrap and refrigerate for at least 1 hour or up to 2 days. This chilling time allows the flour to fully hydrate and the butter to solidify, which prevents the cookies from spreading too much during baking and helps maintain their shape.</li><li class="MethodStepper"><h4 class="step-title">Step 6</h4>When ready to bake, preheat your oven to 180°C and line baking sheets with parchment paper or silicone mats. Remove one disk of dough from the refrigerator and let it sit at room temperature for about 5-10 minutes to slightly soften.</li><li class="MethodStepper"><h4 class="step-title">Step 7</h4>On a lightly floured surface, roll the dough to about 3mm thickness. If the dough sticks, sprinkle a bit more flour underneath and on top. Using your 5cm round cookie cutter, cut out as many circles as possible. Re-roll the scraps once to cut additional cookies. Place the cut cookies about 2.5cm apart on your prepared baking sheets.</li><li class="MethodStepper"><h4 class="step-title">Step 8</h4>Bake the cookies for 8-10 minutes, just until the edges are firm and the centers are set. They won't change color much due to their chocolate content, so look for a matte finish rather than a glossy appearance. Be careful not to overbake as chocolate cookies burn easily and can become bitter.</li><li class="MethodStepper"><h4 class="step-title">Step 9</h4>Allow the cookies to cool on the baking sheet for 5 minutes before transferring them to a wire rack to cool completely. Repeat the process with the remaining dough, being sure your baking sheets are completely cool before placing new dough on them.</li><li class="MethodStepper"><h4 class="step-title">Step 10</h4>While the cookies cool, prepare the mint filling. In your clean mixer bowl, beat the softened butter until creamy. Gradually add the sifted powdered sugar, about 100g at a time, beating well after each addition. The slow incorporation prevents a powdered sugar cloud and ensures a smooth texture.</li><li class="MethodStepper"><h4 class="step-title">Step 11</h4>Add the peppermint extract, vanilla extract, and 2 tablespoons of milk, beating until smooth and creamy. If the filling seems too stiff, add the remaining tablespoon of milk. The filling should be thick enough to hold its shape but spreadable. Add a few drops of green food coloring if desired, mixing until you achieve an even, pale mint color.</li><li class="MethodStepper"><h4 class="step-title">Step 12</h4>If using, fold in the mini chocolate chips or finely chopped chocolate by hand. These add a wonderful textural contrast and enhance the chocolate-mint flavor combination.</li><li class="MethodStepper"><h4 class="step-title">Step 13</h4>Once cookies are completely cool, turn half of them upside down. Using a piping bag fitted with a round tip, or a small offset spatula, place about 1-1.5 teaspoons of filling in the center of each upside-down cookie. Top with another cookie, right side up, and gently press until the filling reaches the edges.</li><li class="MethodStepper"><h4 class="step-title">Step 14</h4>Allow the sandwich cookies to set at room temperature for about 30 minutes, which helps the filling firm up slightly. For the best flavor, let them sit for at least 2 hours before serving to allow the mint flavor to permeate throughout the cookie. Store in an airtight container at room temperature for up to 5 days, or refrigerate for up to 1 week, bringing to room temperature before serving for the best texture and flavor.</li></ol>