Preheat the Oven: Begin by preheating your oven to 140°C (275°F) for fan-forced or 160°C (320°F) for conventional baking. Line your cupcake tins with liners to prepare for the batter.
Mix Dry Ingredients: In a large mixing bowl, combine the plain all-purpose flour, caster sugar, baking powder, and fine salt. Whisk these together using a hand mixer until thoroughly blended.
Combine with Butter: Add softened unsalted butter to the dry mix and blend until the mixture resembles a crumbly texture, ensuring it clumps together nicely for a rich flavor.
Incorporate Wet Ingredients: Add in the large eggs, full-cream whole milk, vegetable oil, Greek yogurt, vanilla extract, and optional tequila. Mix until your dry ingredients are fully incorporated, then blend for an additional 20 seconds until smooth.
Divide the Batter: Split the batter into two bowls. Add pink/red food gel and strawberry flavoring to one bowl, then mix well. In the other bowl, include yellow food gel and mango flavoring, blending until combined.
Fill Piping Bags: Carefully transfer each batter into separate piping bags. Begin by piping the yellow mango batter into the cupcake liners, followed by the red strawberry batter, creating a beautiful two-toned effect.
Bake the Cupcakes: Place the filled cupcake tins in the preheated oven and bake for 40-50 minutes. They’re ready when a toothpick inserted comes out clean. Let them cool completely before frosting.
Prepare the Frosting: While cupcakes cool, split the American buttercream frosting into two bowls. Incorporate pink/red food gel and strawberry flavoring into one bowl, and yellow food gel and mango flavoring into the other, mixing thoroughly.
Sugar the Rims: Lightly brush the rims of each cooled cupcake with water. Roll the edges in granulated sugar for a special sweet touch that adds flavor and crunch.
Frost and Decorate: Using a star piping tip, frost the tops of your cupcakes. Garnish with lime wedges and halved strawberries for that fresh summer flair. Finish with colorful paper straws for the ultimate presentation!