Wendy's Frosty Recipe - only 3 ingredients: cool whip, sweetened condensed milk, and chocolate milk.
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Homemade Chocolate Frosties--16 ounces Cool Whip 1 (14 ounce) can sweetened condensed milk 1 gallon chocolate milk Directions: Pour condensed milk and Cool Whip in an ice cream freezer. Fill to”fill line” with chocolate milk. Stir all ingredients, then turn on machine and let it freeze!