Whisk together cocoa, sugar, butter & milk in saucepan.
Let it cook for 5 minutes or until sugar is dissolved & mixture is bubbling.
Remove from heat and add peanut butter & vanilla.
Once the peanut butter has mixed in, stir in the oats and coconut if adding.
Place in a 9x9 pan or spoon on a cookie sheet with parchment for cookie type servings.
Let it cool for an hour. If you can't wait, we never can, spoon into a bowl & enjoy!