In a saucepan, on medium heat, melt the butter.

Once melted, add in the sugar & milk and bring it to a boil.

Turn off the heat and mix in the peanut butter, oats, cocoa powder, and vanilla.

Once everything is completely combined, drop spoonfuls onto a foil sheet on the counter and let them set. I usually will take my cookie scoop and spread them out a little so they aren't a ball.