Step 1

Prepare a 9x9 pan by lining it with aluminum foil or parchment paper and set it aside.

Step 2

In a large saucepan over medium heat, melt the butter then stir in the brown sugar until well dissolved. Add in the vanilla extract and oats and cook until all ingredients are well combined.

Step 3

Split the oatmeal mixture in half and add ½ of it to the bottom of your prepared pan. Smooth and press it into an even layer.

Step 4

Prepare the chocolate peanut butter mixture. Melt the chocolate chips and peanut butter in a double boiler. Constantly stir until the mixture is smooth.

Step 5

Pour ¾ of the chocolate and peanut butter mixture over the bottom layer of oats.

Step 6

Then spoon the remaining oat mixture on top of the chocolate peanut butter layer until the entire top is covered.

Step 7

Drizzle the remaining chocolate peanut butter mixture across the top.

Step 8

Cover and refrigerate for at least 2 hours to set. Once set, cut and serve.