Directions
<ol class="no-list-style"><li class="MethodStepper"><h4 class="step-title">Step 1</h4>Preheat your oven to 170°C (150°C fan) and line a 20cm square baking tin with parchment paper, leaving an overhang on the sides to help with removal later.</li><li class="MethodStepper"><h4 class="step-title">Step 2</h4>In a large bowl, cream together the softened butter and sugar until light and fluffy, about 3-4 minutes. This extended beating incorporates air into the mixture, creating that classic melt-in-your-mouth shortbread texture.</li><li class="MethodStepper"><h4 class="step-title">Step 3</h4>Add the lime zest and beat for another 30 seconds until fragrant. The oils from the zest will infuse the butter, distributing the citrus flavor throughout.</li><li class="MethodStepper"><h4 class="step-title">Step 4</h4>Pour in the tequila and mix until incorporated. Don't worry if the mixture looks slightly curdled – this is normal when adding liquid to a fat base and will come together with the flour.</li><li class="MethodStepper"><h4 class="step-title">Step 5</h4>Sift together the flour and salt, then gradually add to the butter mixture, mixing on low speed until just combined. Overmixing will develop gluten and result in tough shortbread, so stop as soon as no dry flour remains visible.</li><li class="MethodStepper"><h4 class="step-title">Step 6</h4>Gently fold in the diced jalapeños and cayenne pepper (if using) until evenly distributed throughout the dough. The heat from the peppers will mellow slightly during baking, so don't be afraid to add a bit more than you think you need.</li><li class="MethodStepper"><h4 class="step-title">Step 7</h4>Press the dough evenly into the prepared baking tin. For a perfectly smooth top, use the bottom of a measuring cup or glass to press down. Prick the surface all over with a fork to allow steam to escape during baking.</li><li class="MethodStepper"><h4 class="step-title">Step 8</h4>Chill the dough in the refrigerator for 15 minutes. This step is crucial as it relaxes the gluten and firms the butter, resulting in a tender, crisp shortbread.</li><li class="MethodStepper"><h4 class="step-title">Step 9</h4>Bake for 25-30 minutes until the edges are just beginning to turn golden brown but the center still looks pale. Shortbread should not darken much – a light color indicates the perfect crisp-yet-tender texture.</li><li class="MethodStepper"><h4 class="step-title">Step 10</h4>While still hot, use a sharp knife to score the shortbread into 16 pieces (4×4 grid), then allow to cool completely in the tin. Cutting while warm prevents cracking, but the final cut should be done once fully cooled.</li><li class="MethodStepper"><h4 class="step-title">Step 11</h4>For the glaze, whisk together the icing sugar, tequila, and lime juice until smooth. The glaze should be thick but pourable – add more icing sugar or liquid as needed to adjust the consistency.</li><li class="MethodStepper"><h4 class="step-title">Step 12</h4>Once the shortbread is completely cool, drizzle or spread the glaze over the top. Immediately sprinkle with flaky sea salt, additional lime zest, and diced jalapeño if desired – this mimics the salt rim of a classic margarita.</li><li class="MethodStepper"><h4 class="step-title">Step 13</h4>Allow the glaze to set for about 1 hour before cutting along the score lines with a sharp knife. For clean cuts, wipe the knife between each slice. Store in an airtight container at room temperature for up to 5 days, though the spicy flavor is most pronounced in the first 2-3 days.</li></ol>