Peppermint Mocha Cupcakes

Name: Peppermint Mocha Cupcakes
Prep time: 25 min
Cook time: 15 min
Total time: 40 min
Cuisine: American
Ingredients: 3 tablespoons instant espresso powder; 1 tablespoon hot water; 1.25 cups all-purpose flour; 0.5 cup unsweetened cocoa powder; 2 teaspoons baking powder; 1 teaspoon baking soda; 0.5 teaspoon salt; 6 tablespoons unsalted butter, softened; 0.5 cup firmly packed dark brown sugar; 0.25 cup white sugar; 1 large egg, at room temperature; 2 teaspoons vanilla extract; 1 teaspoon peppermint extract; 0.5 cup strongly brewed coffee, cooled to room temperature; 0.5 cup buttermilk, at room temperature; 0.5 cup semisweet chocolate chips (such as Ghiradelli® 60% Cacao)