1In a bowl, mix 4 cups of chocolate milk, 1/2 container of Cool Whip, and 7 oz of sweetened condensed milk.
2Mix well all ingredients.
3Pour the mixture into the Ninja Slushi.
4Select the milkshake setting and increase it one level up.
5Wait 22 minutes for the frosty to be ready.
6Repeat steps 1 to 4 for the vanilla frosty, using 4 cups of whole milk, 1/2 container of Cool Whip, 7 oz of sweetened condensed milk, and 2 tablespoons of vanilla extract.