Divide the batter evenly between the prepared cupcake liners. Bake for about 15-20 minutes or until a toothpick inserted in the center comes out clean. Allow to cool in the pans for 5-10 minutes, then remove to a wire rack over wax paper to cool completely.
Once the cupcakes have cooled, whisk together the limeade concentrate and confectioners’ sugar in a small bowl to make the lime syrup. Poke several holes in the top of each cupcake with a skewer and pour the syrup over the cupcakes, allowing it to soak in.
Frost cooled cupcakes (recipe below). Garnish with lime slices and strawberry slices, if desired.
Beat butter and 1 cup powdered sugar on medium speed for 1 minute.