Preheat the Oven: Preheat your oven to 350°F (175°C) and line a 9x13-inch baking pan with parchment paper, allowing some overhang for easy removal later.
Mix the Peanut Butters: In a large mixing bowl, combine the creamy peanut butter, chunky peanut butter, brown sugar, and granulated sugar. Mix until well combined.
Incorporate Eggs and Vanilla: Add the eggs and vanilla extract, mixing again until creamy and smooth.
Combine Dry Ingredients: In a separate bowl, combine the flour, baking soda, and salt. Gradually add this mixture to the wet ingredients, mixing just until combined.
Add Oats and Chips: Gently fold in the rolled oats, peanut butter chips, and chocolate chips until evenly distributed.
Bake: Pour the batter into the prepared baking pan and spread it evenly. Bake for about 20-25 minutes, or until a toothpick inserted into the center comes out clean.
Cool & Slice: Allow the cookie bars to cool in the pan for at least 10 minutes before using the parchment paper to lift them out. Slice into squares and enjoy!