coffee-choco cupcake with malted buttercream

Ingredients

• 1/2 cup salted butter, softened
• 1 cup sugar
• 1 - egg
• 1 teaspoon pure vanilla extract
• 1 1/2 cups all purpose flour
• 1/2 cup cocoa powder
• 1 teaspoon baking soda
• 1/2 cup buttermilk
• 1/2 cup strong brewed coffee
• 1 cup salted butter, softened
• 6 tablespoons vanilla malt powder
• 2 teaspoons pure vanilla extract
• 1/2 cup milk
• 6-8 cups powdered sugar