Instructions

1. Evenly pour 2-1/2 cups of chocolate milk into ice cube tray(s).
2. Freeze overnight.
3. In a blender, combine frozen cubes of chocolate milk, cold chocolate milk and sweetened condensed milk.
4. Blend to get the mixture started.
5. Add in whipped topping.
6. Pulse until smooth and well incorporated.
7. Sides of the blender may need to be scraped down between blending. If the frosty is too thick, add a little more chocolate milk.
8. Enjoy immediately or remove from blender and place into freezer-safe container.

Rainbow version

1. Once frosty is well blended, divide evenly between 4-5 bowls.
2. Working quickly, combine 3-4 drops of food coloring into each bowl.
3. Stir each color until evenly incorporated. Add more food coloring as needed, a few drops at a time for desired color.
4. Cover bowls and place in freezer for 15-20 minutes.
5. Remove colored frosty mixtures and stir.
6. In a cup, layer each color.
7. Enjoy!