• Pre-heat the oven to 350°F. Grease and flour a 9x13-inch baking pan. Set aside for later.
• In a small saucepan over low heat, melt 1 stick of butter and 8 chopped Milky Way fun-size candy bars. Stir constantly until the mixture is smooth. Remove from the heat and let it cool.
• In a medium bowl, whisk together flour and baking soda. Set aside.
• In a large bowl, cream together 2 sticks of butter and 2 cups of sugar. Beat until it is light and fluffy.
• Add in eggs one at a time, mixing well after each one. Stir in vanilla.
• Add flour mixture to the batter, alternating with milk, beginning and ending with flour. Mix just until combined.
• Mix in the melted Milky Way mixture and mix just until it's mixed well, then fold in the nuts (if you are using).
• Pour batter into the prepared pan and spread evenly.
• Bake for 35-40 minutes, or until the toothpick comes out with moist crumbs and the center springs back lightly when touched.
• Cool completely before frosting.

Frosting

• In a saucepan over low heat, melt butter and chocolate chips together, stirring until smooth.
• Add sweetened condensed milk and stir well. Then mix in the marshmallow cream.
• Gradually beat in the powdered sugar until smooth and spreadable.
• Immediately pour the warm, pourable frosting over the cooled cake.

  If topping with more chopped Milky Way candy bars, let the frosting cool just a few minutes before adding. Then, let the frosting cool and set completely before slicing. You can also top with caramel ice cream topping when the frosting fully sets, if desired.