Margarita Ice-Cream Sandwiches Recipe

Ingredients

• 1/2 cup unsalted butter, softened
• 1 cup sugar
• 1 large egg
• 5 teaspoons grated lime rind, divided
• 2 tablespoons fresh lime juice
• 11 1/4 ounces all-purpose flour (about 2 1/2 cups)
• 1 1/2 teaspoons baking powder
• 1/8 teaspoon table salt
• 1 teaspoon turbinado sugar
• 1/2 teaspoon coarse sea salt
• 2 cups vanilla reduced-fat ice cream, softened
• 2 cups lime sherbet, softened