Preparation Steps

• Preheat your oven to 350 degrees F (175 degrees C).
• In a large bowl, cream together the softened butter, granulated sugar, and brown sugar until smooth.
• Beat in the egg and vanilla extract until well combined.
• In another bowl, combine the flour and baking soda; gradually add this to the creamed mixture.
• Stir in the chocolate chips and mini marshmallows.
• Drop by rounded tablespoon onto ungreased baking sheets.
• Bake for 10 to 12 minutes in the preheated oven until edges are golden brown.
• Cool on baking sheets for a few minutes before transferring to wire racks to cool completely.