This was a fav of mine as a child. My kids loved them and I still make them for different events.
No Bake Chocolate Peanut Butter Cookies
2 cups sugar
1/2 cup milk
1/4 cup butter
1/3 cup cocoa
2 1/2 cup quick oats
1/2 cup peanut butter
1/2 tablespoon vanilla extract
Combine sugar, milk, butter, and cocoa in a medium saucepan. Cook over medium heat stirring occasionally, until the mixture comes to a boil. Cook for two more minutes stirring constantly and then remove heat.
Stir in peanut butter and vanilla, the oats.
Let cool for several minutes and then drop spoonfuls onto waxed paper. Let the cookies cool completely before removing from wax paper.