Here’s one of my favorite recipes. Taken from here with small changes:
https://www.allrecipes.com/recipe/16617/no-bake-cookies-v/Freezer Cookies1 & 1/2 cups white sugar
1/2 cup brown sugar
1/4 cup unsweetened cocoa powder
1/2 cup milk
1/2 cup margarine
1 teaspoon vanilla extract
1 pinch salt
1/2 cup chunky peanut butter
3 cups quick cooking oats
In a saucepan over medium heat, combine the sugar, cocoa, milk and margarine. Bring to a boil, stirring occasionally. Boil for 1 minute, then remove from heat and stir in the vanilla, salt, peanut butter and oats.
Drop large spoonfuls onto plates (wax paper for easier removal) and place in freezer until frozen (a couple hours).