No bake cookies

Ingredients
1 3/4 cups white sugar
1/2 cup milk
1/2 cup butter
4 tablespoons unsweetened cocoa powder
1/2 cup crunchy peanut butter
3 cups quick-cooking oats
1 teaspoon vanilla extract
Directions
In a medium saucepan, combine sugar, milk, butter, and cocoa. Bring to a boil, and cook for 1 1/2 minutes. Remove from heat, and stir in peanut butter, oats, and vanilla. Drop by teaspoonfuls onto wax paper. Let cool until hardened.