Preheat oven to recommended temp on box of Brownies.
We grease the bottom only of a 2 quart Glass Pyrex dish and bake for exactly 30 minutes. This produces a very fudgy brownie that is cooked perfectly.
Prepare batter as directed on box, adding 1 TBSP of Hersheys Syrup. pour batter into baking dish and dot batter throughout with Peanut Butter by the teaspoonful. Swirl batter over Peanut Butter with a butter knife to create a marble design. Bake 30 minutes.
Bake exactly 30 minutes. Immediately upon pulling Brownies from oven, Dollop Nutella on the Brownies and let set. DO NOT SPREAD YET. Let the Nutella melt a few minutes and soften. Spread gently over Brownies to sides of pan and let brownies cool. The Nutella sets up beautifully as if it were a frosting. ENJOY!