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/325°F). Grease and line two 20cm (8-inch) round cake tins with parchment paper. This lower temperature helps the cake bake evenly without drying out the edges. </li> <li class="MethodStepper"> <h4 class="step-title">Step 2</h4> In a large bowl, cream together the butter and caster sugar until pale and fluffy, about 5-6 minutes. This extended beating time is crucial as it creates air pockets that help your cake rise and achieve a light texture. The mixture should be noticeably lighter in both color and consistency when ready. </li> <li class="MethodStepper"> <h4 class="step-title">Step 3</h4> Add the eggs one at a time, beating well after each addition. If the mixture looks like it's beginning to curdle, add a tablespoon of your measured flour to stabilize it. The proteins in the egg whites provide structure while the yolks add richness and moisture. </li> <li class="MethodStepper"> <h4 class="step-title">Step 4</h4> In a separate bowl, whisk together the flour, baking powder, and salt. In another small bowl, combine the lime zest, lime juice, tequila, triple sec, buttermilk, and vanilla extract. The acid in the buttermilk and lime juice will react with the baking powder to help the cake rise, creating a tender crumb. </li> <li class="MethodStepper"> <h4 class="step-title">Step 5</h4> Add one-third of the flour mixture to the butter mixture and fold gently until just combined. Pour in half the liquid ingredients and fold again. Continue alternating, ending with the flour mixture. This method prevents gluten from developing too much, keeping your cake tender. Be careful not to overmix - stop as soon as the ingredients are incorporated. </li> <li class="MethodStepper"> <h4 class="step-title">Step 6</h4> Divide the batter evenly between the prepared tins. Tap the tins gently on the counter to remove any large air bubbles. Bake for 30-35 minutes, or until a skewer inserted into the center comes out clean and the tops spring back when lightly pressed. The cakes should be golden on top and starting to pull away from the sides of the tins. </li> <li class="MethodStepper"> <h4 class="step-title">Step 7</h4> While the cakes are baking, prepare the tequila-lime syrup. In a small saucepan, combine the lime juice and sugar. Bring to a simmer over medium heat, stirring until the sugar dissolves completely. Remove from heat and stir in the tequila. Set aside to cool slightly. This syrup will add moisture and intensify the cocktail flavors. </li> <li class="MethodStepper"> <h4 class="step-title">Step 8</h4> When the cakes are done, leave them in their tins and place on a cooling rack. While still warm, use a skewer or toothpick to poke holes all over the top of both cakes. Slowly spoon about two-thirds of the tequila-lime syrup over the cakes, allowing it to absorb. Reserve the remaining syrup for the frosting. Let the cakes cool completely in their tins. </li> <li class="MethodStepper"> <h4 class="step-title">Step 9</h4> For the frosting, beat the softened butter until creamy and pale, about 3 minutes. Gradually add the sifted icing sugar, beating well after each addition. Pour in the lime juice, tequila, triple sec, and add the lime zest. Beat until the frosting is light and fluffy, about 5 minutes. If it's too thick, add a splash of lime juice; if too thin, add a little more icing sugar. </li> <li class="MethodStepper"> <h4 class="step-title">Step 10</h4> Once the cakes are completely cool, carefully remove them from the tins. Place one layer on your serving plate, flat side up. Spread a generous layer of frosting over the top. Place the second cake layer on top, flat side down. Cover the entire cake with a thin layer of frosting (crumb coat), then refrigerate for 20 minutes to set. This will seal in any crumbs and make the final frosting layer smoother. </li> <li class="MethodStepper"> <h4 class="step-title">Step 11</h4> After chilling, apply the remaining frosting to the cake, swirling decoratively with an offset spatula or the back of a spoon. Leave about 2cm (¾ inch) around the top edge unfrosted for the salt-sugar rim. </li> <li class="MethodStepper"> <h4 class="step-title">Step 12</h4> For the rim, mix the sea salt, sugar, and lime zest in a small bowl. Brush the unfrosted edge of the cake with a little of the reserved syrup, then carefully press the salt-sugar mixture onto this area to create the signature margarita salt rim effect. </li> <li class="MethodStepper"> <h4 class="step-title">Step 13</h4> Refrigerate the cake for at least 30 minutes before serving to allow the flavors to meld. For the best flavor and texture, remove from the refrigerator about 30 minutes before serving. This cake will keep for up to 3 days in an airtight container in the refrigerator, though the salt rim may begin to dissolve slightly after the first day. </li> </ol>