In a medium-sized saucepan over medium-high heat, add the ½ cup unsalted butter, 2 cups granulated sugar, ½ cup milk, and 4 tablespoons cocoa powder .
Bring to a rolling boil for 1 minute or until the temperature reaches 225°F on an instant-read thermometer. Remove from heat.
Stir in ¾ cup peanut butter , 2 ¾ cups quick oats and 1 tablespoon vanilla, then mix until incorporated.
Line a cookie sheet with parchment paper. Using a medium-sized cookie scoop, scoop the cookies and drop them onto the parchment paper. Let the cookies set and cool to room temperature or refrigerate them before serving.
Video
Notes
Leftover Instructions
Fridge: Store in an airtight container at room temperature for up to 5 days.
Freezer: Store in a freezer-safe container for up to 3 months. Thaw the cookies at room temperature before serving.