Step 1: Prepare the Oat Mixture

• In a medium saucepan, melt the butter over medium heat.
• Stir in the brown sugar and vanilla extract, mixing until the sugar dissolves.
• Add the rolled oats, stirring continuously for 2-3 minutes until well coated.

Step 2: Press the Oats Into a Pan

• Line an 8×8-inch or 9×9-inch baking dish with parchment paper.
• Press half of the oat mixture firmly into the bottom of the dish.
• Reserve the other half for topping.

Step 3: Melt the Chocolate Layer

• In a microwave-safe bowl, combine the chocolate chips and peanut butter.
• Microwave in 30-second intervals, stirring each time, until smooth and fully melted.
• Pour the melted chocolate mixture over the oat layer, spreading evenly.

Step 4: Add the Final Oat Layer

• Sprinkle the remaining oat mixture over the chocolate, pressing it down gently.
• (Optional) Add extra chocolate chips or oats on top for decoration.

Step 5: Chill Until Set

• Refrigerate for at least 2 hours (or freeze for 30 minutes) until firm.
• Once set, lift the bars from the pan and cut them into squares.

Step 6: Serve & Enjoy!

• Serve cold or at room temperature.
• Store leftovers in an airtight container in the fridge for up to 1 week.