Chocolate Hazelnut Banana Cupcakes w/ Marshmallow Frosting

Ingredients

• 0.5 tsps baking powder
• 2 tsps baking soda
• some sweetened banana chips
• 150 g bananas
• 220 g brown sugar
• 227 g butter
• some light cocoa powder
• 2 eggs
• 125 g flour
• 2 Tbsps heavy cream
• regular sized marshmallows
• 732 ml milk
• 269.32 g nutella
• 0.5 tsps powdered sugar
• 3 Tbsps salt
• 1 tsp sour cream
• 1.5 tsps vanilla extract
• 1.5 tsps vanilla