Fluffernutter Bars 🥜🍫

Ingredients:

• 1/2 cup unsalted butter, softened
• 1/2 cup creamy peanut butter
• 3/4 cup granulated sugar
• 1/4 cup brown sugar
• 1 large egg
• 1 teaspoon vanilla extract
• 1 1/4 cups all-purpose flour
• 1/2 teaspoon baking powder
• 1/4 teaspoon salt
• 1/2 cup marshmallow fluff
• 1/2 cup mini chocolate chips (optional)