Step 1

Line two baking sheets with parchment paper or wax paper.

Step 2

In a medium saucepan, combine the sugar, milk, butter, and cocoa powder and place over medium heat. Stir occasionally until the mixture reaches a boil.

Step 3

Allow the mixture to boil for exactly 60 seconds without stirring, then remove from heat. Add the oats, peanut butter, and vanilla. Stir until well combined.

Step 4

Use a cookie scoop or spoon to drop heaps of the mixture onto parchment paper (about 2 tablespoons each). Let the cookies cool until set, 20 to 30 minutes. Enjoy immediately or store in an airtight container for up to 1 week.