Guinness Cupcakes with Espresso Frosting Recipe

Ingredients

• 1 (12 fluid ounce) can or bottle Irish stout beer (such as Guinness®)
• 4 tablespoons unsalted butter
• 0.5 teaspoon vanilla extract
• 2 cups all-purpose flour
• 2 cups white sugar
• 0.75 cup unsweetened cocoa powder
• 1.25 teaspoons baking soda
• 1 teaspoon salt
• 0.75 cup sour cream
• 3 eggs
• 3 cups powdered sugar
• 0.33333334326744 cup unsalted butter, cubed and softened
• 3 tablespoons water
• 1.5 teaspoons instant espresso powder