Fudgy Nutella Brownies (Easy Box Mix Hack)

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Want that rich, bakery-style dessert without the hassle of measuring flour and cocoa powder? These Fudgy Nutella Brownies are the ultimate box mix hack. By combining a standard mix with creamy hazelnut spread and extra chocolate chips, you get a treat that is incredibly thick and satisfying.

Why This Is The Best Box Mix Hack

Bakery Thickness: We use two boxes of mix in a single pan. This creates those ultra-thick, tall brownies that you usually only get at a bakery.
Triple Chocolate Threat: Between the cocoa in the mix, the chocolate chips, and the creamy Nutella, this is a chocolate lover's dream.
The "Covered" Secret: Because these are so thick, we cover them halfway through baking. This keeps the center fudgy without burning the top—a trick most home bakers don't know!
Foolproof: You get the reliability of a boxed mix with the gourmet flavor of homemade.

Ingredients for the Nutella Brownies

Boxed Brownie Mix: This provides the foolproof base and structure for the recipe, saving time on measuring dry ingredients while ensuring a consistent result.
Nutella: Adding this hazelnut spread introduces a high fat content and moisture, which prevents the brownies from drying out and adds a distinct, nutty sweetness.
Chocolate Chips: These add texture and pockets of melted chocolate. Using semi-sweet chips helps balance the sweetness of the Nutella and the box mix.
Eggs, Oil, & Water: These are essential for hydrating the mix and binding the brownies. (Always follow the specific ratios on your box brand for the best chemical reaction).

Whipping Up Your Rich Nutella Brownie Batter

Step 1: Prepare the Batter Start by preheating your oven to 350°F (175°C) and greasing a 9x13 baking dish. In a large bowl, prepare both boxes of brownie mix according to the package instructions (adding the required eggs, oil, and water).
Step 2: Add the Goodness Once the base batter is smooth, add the Nutella and chocolate chips. Mix well to ensure the Nutella is fully incorporated—this guarantees flavor in every bite rather than just a swirl on top.
Step 3: The First Bake Pour the thick batter into your prepared pan and spread it evenly. Bake for 30 minutes.
Step 4: The "Covered" Secret After 30 minutes, cover the pan with aluminum foil. Return it to the oven for another 10–15 minutes. This crucial step allows the center to set and stay fudgy without the top crust burning or drying out.
Step 5: Test and Cool Insert a toothpick into the center; it should come out mostly clean (a few moist crumbs are okay, but no wet batter). Let the brownies cool completely in the pan before slicing to get those clean, sharp edges.

The key is to make sure the Nutella gets well incorporated into batter so it can be enjoyed with every bite. Do not just swirl the Nutella on top.

Freezing Nutella Brownies Make Ahead Tips

The brownies can be frozen for 2-3 months. Bring them up to room temperature before serving. Serve the Nutella brownies with my vanilla ice cream!

FAQ's

What makes Nutella Brownies different from regular brownies?

Nutella Brownies, or Trinity Brownies, combine boxed brownie mix with Nutella and chocolate chips, creating a rich, fudgy, triple-chocolate treat that's both easy and decadent.

How much Nutella and chocolate chips should I add?

Use 6 to 9 ounces of each. That’s approximately ½ to ¾ of a standard jar of Nutella and ½ to ¾ of a typical bag of chocolate chips—adjust based on your chocolate preference.

Can I use any brand of boxed brownie mix?

Yes! You can use your favorite brand—just follow the directions on the back of the box and add the Nutella and chocolate chips at the end.

Do I need any special equipment to mix the brownies?

No special equipment is required. You can mix by hand, with a hand mixer, or with a stand mixer—whichever you prefer.

Why do the brownies need to be covered during part of the baking process?

Covering the brownies for the last 10 minutes helps them bake evenly and stay moist without overcooking the top.

How can I tell when the brownies are fully baked?

Insert a toothpick into the center—if it comes out clean, they’re done. If not, bake in 4-5 minute increments, keeping them covered until ready.

Can I freeze the Brownies?

Yes, you can freeze them for 2–3 months. Just let them return to room temperature before serving for the best texture and flavor.

How do I cut these brownies cleanly?

For the cleanest cuts, let the brownies cool completely. You can even chill them in the fridge for an hour before slicing. Using a plastic knife can also prevent the fudgy center from sticking.

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