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)