Baking these brownies is as much about the process as it is about the final product. Here’s how you can recreate this delicious memory in your own kitchen:

1. Preheat your oven to 350°F (175°C) and line a 9×13 inch baking pan with parchment paper.
2. In a large bowl, whisk together the melted butter, granulated sugar, and brown sugar until well combined.
3. Add the eggs one at a time, beating well after each addition, then stir in the vanilla extract.
4. In a separate bowl, sift together the flour, cocoa powder, and salt, then gradually fold the dry ingredients into the wet mixture.
5. Once combined, gently fold in the peanut butter, REESE’s PIECES, and chocolate chips, being careful not to overmix.
6. Pour the batter into the prepared baking pan, spreading it evenly with a spatula.
7. Bake for 30-35 minutes, or until a toothpick inserted into the center comes out with just a few moist crumbs attached.
8. Allow the brownies to cool in the pan for at least 15 minutes before slicing and serving.

Remember, patience is key here. The cooling time allows the flavors to meld, much like how Mama Lou always said letting things rest makes them better.