Step 1

Stir together sweetened condensed milk and whipped topping in a large bowl. Gradually whisk in chocolate milk until well blended.

Step 2

Pour half of mixture into an ice cream maker, and freeze according to manufacturer’s instructions. Refrigerate remaining mixture until first batch is complete or up to 1 week.

Step 3

Serve first batch immediately with a straw and a spoon. Repeat freezing process when ready to prepare remaining frosty mixture.