PREHEAT THE OVEN TO 350F. LINE A 9X13” BAKING SHEET OR DISH WITH PARCHMENT PAPER.
IN A MEDIUM BOWL, MIX THE CAKE MIX, MELTED PEANUT BUTTER & EGG. I RECOMMEND MICROWAVING THE PEANUT BUTTER FOR 30 SECONDS BEFORE MIXING IT IN.
STIR IN CHOCOLATE CHIPS & REESE’S PIECES.
SPREAD THE MIXTURE INTO THE PAN & BAKE FOR 20-25 MINUTES.
WHILE THE BARS ARE STILL WARM, PRESS INDIVIDUAL GHIRARDELLI SQUARES IN ROWS.
ALLOW THE BARS TO COOL COMPLETELY BEFORE SLICING!