PEANUT BUTTER CUPCAKES

• 1/2 cup (104g) sugar
• 1/4 cup (36g) brown sugar
• 1/4 cup (56g) unsalted butter, room temperature
• 1/2 cup (140g) creamy peanut butter
• 1/4 cup (58g) sour cream, room temperature
• 1 tsp vanilla extract
• 3 large egg whites, room temperature
• 1 1/4 cups (163g) all-purpose flour
• 2 tsp baking powder
• 1/4 tsp salt
• 6 tbsp (90ml) milk, room temperature
• 2 tbsp (30ml) water, room temperature
• 1/2 cup crushed butterfingers

CHOCOLATE GANACHE

• 5 oz (142g) semi sweet chocolate chips
• 6 tbsp (90ml) heavy whipping cream

PEANUT BUTTER FROSTING

• 1/2 cup (112g) salted butter
• 1/2 cup (140g) peanut butter
• 1/4 cup (48g) shortening
• 3 1/2 cups (403g) powdered sugar
• 3-4 tbsp (45-60ml) water or milk
• 3/4 cup crushed butterfingers