Peanut Butter Choc Chip Cupcakes with Marshmallow Buttercream

Cupcakes

• 55 g 1/4 cup unsalted butter, room temperature
• 130 g 1/2 cup smooth peanut butter, plus extra for drizzling
• 210 1 cup caster sugar
• 2 eggs
• 2 teaspoons vanilla extract
• 220 g 1 ½ cups plain (all purpose) flour
• 1 ¼ teaspoons baking powder
• 80 ml 1/3 cup buttermilk
• ½ cup dark chocolate chips
• 2/3 cup marshmallow fluff

Buttercream

• 125 g 1/2 cup unsalted butter, room temperature
• 2 teaspoons vanilla extract
• 1 cup marshmallow fluff
• 1 ½ cups icing sugar powdered sugar