Champagne Grape Cupcakes

Name: Champagne Grape Cupcakes
Prep time: 20 min
Cook time: 20 min
Total time: 40 min
Cuisine: American
Ingredients: 1 cup champagne (or sparkling wine); 1 1/2 cups cake flour (substitute all purpose flour); 1 1/2 teaspoons baking powder; 1/4 teaspoon kosher salt; 1/2 cup unsalted butter (melted); 1 cup granulated sugar; 2 large eggs (room temperature); 1 teaspoon vanilla extract; 2 tablespoons champagne reduction (cooled); 1/3 cup whole milk; 1 cup unsalted butter (room temperature); 3 cups powdered sugar; 1/2 teaspoon vanilla extract; 2-3 tablespoons champagne reduction (cold); 1/2 cup grape jelly; champagne grapes