In a medium sauce pan, combine butter, sugar, cocoa powder, and milk. Heat on medium until boiling. Boil for exactly 1 minute. Remove from heat and add in peanut butter and vanilla.
Pour chocolate mixture over oats and mix well. Let sit 5 minutes then stir again.
Drop by tablespoon (I use a cookie scoop) onto wax paper. Allow to cool.
Notes
If you don't have quick oats, you can use old-fashioned oats and pulse them in a food processor a few times to cut them smaller.
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