Low-Fat Copycat Wendy's Frosty

"The taste and texture of this copycat Wendy's Frosty is spot-on and you don't need an ice cream maker. Simply add 4 ingredients to your blender, whiz, freeze for 30 minutes, and enjoy. The recipe is low-fat because it uses fat-free versions of whipped topping and sweetened condensed milk, chocolate milk is low-fat, and there's no fat in cocoa powder. If you want to use full-fat products, be my guest. You could likely keep the recipe vegan by using vegan whipped topping, omit the sweetened condensed milk, and use chocolate almond milk. It's smooth, creamy, rich, sweet, and refreshing with nostalgic charm...."