Chocolate Peanut Butter No Bake Cookies

So I tried to make these ALL organic but I learned that you can't use organic peanut butter in these due to the oil it makes them soft and not melt in your mouth like.

Chocolate Peanut Butter No Bake Cookies
2 Cups Sugar
4 Tablespoons Cocoa
1 Stick Butter
1/2 Cup Milk
1 Cup Peanut Butter
1 Tablespoon Vanilla
3 Cups Oatmeal
Waxed Paper

Directions
In a heavy saucepan bring to a boil, the sugar, cocoa, butter and milk. Let boil for 1 minute then add peanut butter, vanilla and oatmeal. On a sheet of waxed paper, drop mixture by the teaspoonfuls and let sit until cooled and hardened.