Preparation Steps

• Grease an 8x8 inch baking pan.
• In a heavy-bottomed saucepan, combine granulated sugar, butter, and evaporated milk. Cook over medium heat, stirring constantly, until butter is melted and sugar is dissolved. Bring to a boil, then reduce heat and simmer for 5 minutes, stirring occasionally.
• Remove from heat. Stir in chocolate chips until melted and smooth.
• Add marshmallow fluff and vanilla extract. Stir until well combined and smooth.
• If using, stir in chopped nuts.
• Pour the mixture into the prepared baking pan and spread evenly.
• Let cool completely at room temperature, then cut into squares.