Add butter, milk, and peanut butter to a heavy saucepan and place over medium-high heat. Stir to combine.

Add sugar, and cocoa powder, stir until well combined. Cook, stirring often until mixture comes to a boil.

Boil one minute thirty seconds.

Remove from heat and add vanilla, oats and toffee bits.

Stir until well combined and spoon onto wax paper or a Silpat.

Allow to cool completely before serving.
Store in an airtight container.