These brownies are rich, gooey, and loaded with chocolate flavor, then swirled with creamy peanut butter and Nutella for a dessert that feels over-the-top in the best way. The batter bakes into dense, fudgy squares with shiny tops and ribbons of nutty sweetness. They’re easy enough for a weeknight but impressive enough for a party.
If you love the classic peanut butter and chocolate combo, this recipe will become your go-to. One bowl, simple steps, and a guaranteed crowd-pleaser.
Peanut Butter Nutella Swirl Brownies – The Ultimate Fudgy Dessert
Ingredients
Method
- Prep the pan: Heat oven to 350°F (175°C). Line an 8×8-inch (20×20 cm) pan with parchment, leaving a 1-inch overhang for easy lifting. Lightly grease the parchment.
- Melt chocolate and butter: In a heatproof bowl, melt the butter and chopped chocolate together over a simmering pot of water, or microwave in 20–30 second bursts, stirring until smooth. Let cool 3–5 minutes so it’s warm, not hot.
- Whisk in sugars: Stir in granulated and brown sugars until glossy and combined.
- Add eggs and vanilla: Whisk in eggs one at a time until the batter looks thick and shiny. Mix in vanilla. Don’t overbeat—30 seconds is plenty.
- Fold in dry ingredients: Sift or whisk flour, cocoa, and salt together. Fold into the wet mixture just until no dry streaks remain. If using chocolate chips, fold them in now.
- Spread the batter: Pour batter into the prepared pan and smooth the top with a spatula.
- Warm the swirls: Gently warm peanut butter and Nutella in separate small bowls for 10–15 seconds in the microwave to loosen. Dollop heaping teaspoons of each all over the surface.
- Create the swirl: Use a butter knife or skewer to drag through the dollops in gentle figure-eights. Don’t over-swirl; 6–8 passes are enough for clean ribbons.
- Bake: Bake 22–28 minutes, until the edges are set and the center still looks slightly soft. A toothpick should come out with moist crumbs, not wet batter.
- Cool completely: Let brownies cool in the pan on a rack at least 1 hour. Lift out with parchment and slice with a warm, clean knife for neat edges.
What Makes This Recipe So Good
- Ultra-fudgy texture: Melted chocolate and butter create a rich base that stays moist and dense, never cakey.
- Perfect swirl: Peanut butter and Nutella melt into gorgeous ribbons that add flavor and a bit of chew.
- Balanced sweetness: A touch of salt keeps the brownies from tipping too sweet and highlights the chocolate.
- Simple ingredients: Everything is easy to find and pantry-friendly.
- No fussy techniques: No mixer needed—just melt, whisk, and bake.
Ingredients
- 1/2 cup (115 g) unsalted butter, plus extra for greasing
- 6 oz (170 g) semisweet chocolate, chopped (or chips)
- 3/4 cup (150 g) granulated sugar
- 1/4 cup (50 g) brown sugar, packed
- 2 large eggs, room temperature
- 1 tsp vanilla extract
- 3/4 cup (95 g) all-purpose flour
- 1/4 cup (25 g) unsweetened cocoa powder, natural or Dutch-process
- 1/2 tsp fine sea salt
- 1/3 cup (85 g) creamy peanut butter
- 1/3 cup (100 g) Nutella (or other chocolate-hazelnut spread)
- Optional: 1/2 cup (85 g) chocolate chips for extra chocolate pockets
Step-by-Step Instructions
- Prep the pan: Heat oven to 350°F (175°C). Line an 8×8-inch (20×20 cm) pan with parchment, leaving a 1-inch overhang for easy lifting.
Lightly grease the parchment.
- Melt chocolate and butter: In a heatproof bowl, melt the butter and chopped chocolate together over a simmering pot of water, or microwave in 20–30 second bursts, stirring until smooth. Let cool 3–5 minutes so it’s warm, not hot.
- Whisk in sugars: Stir in granulated and brown sugars until glossy and combined.
- Add eggs and vanilla: Whisk in eggs one at a time until the batter looks thick and shiny. Mix in vanilla.
Don’t overbeat—30 seconds is plenty.
- Fold in dry ingredients: Sift or whisk flour, cocoa, and salt together. Fold into the wet mixture just until no dry streaks remain. If using chocolate chips, fold them in now.
- Spread the batter: Pour batter into the prepared pan and smooth the top with a spatula.
- Warm the swirls: Gently warm peanut butter and Nutella in separate small bowls for 10–15 seconds in the microwave to loosen.
Dollop heaping teaspoons of each all over the surface.
- Create the swirl: Use a butter knife or skewer to drag through the dollops in gentle figure-eights. Don’t over-swirl; 6–8 passes are enough for clean ribbons.
- Bake: Bake 22–28 minutes, until the edges are set and the center still looks slightly soft. A toothpick should come out with moist crumbs, not wet batter.
- Cool completely: Let brownies cool in the pan on a rack at least 1 hour. Lift out with parchment and slice with a warm, clean knife for neat edges.
How to Store
- Room temperature: Keep in an airtight container for 2–3 days.
Place parchment between layers to preserve the swirl.
- Refrigerator: Store up to 5–6 days for extra fudginess. Let sit at room temp 15 minutes before serving.
- Freezer: Wrap individual squares in plastic, then place in a freezer bag for up to 2 months. Thaw at room temp or warm 10–15 seconds in the microwave.
Benefits of This Recipe
- Reliable texture: The mix of melted chocolate and cocoa guarantees dense, fudgy brownies with a shiny top.
- Built-in wow factor: The swirl looks bakery-level without extra work.
- Customizable sweetness: Adjust the chocolate type and toppings to taste.
- Minimal cleanup: One bowl for the batter and two tiny bowls for the swirls—done.
- Make-ahead friendly: Flavor deepens on day two, making them perfect for events.
What Not to Do
- Don’t overbake: Pull them when the center is just set.
Overbaking leads to dry, cakey squares.
- Don’t skip the salt: It sharpens the chocolate flavor and balances the sweet spreads.
- Don’t use natural peanut butter without stirring: If using natural, mix thoroughly until smooth to avoid oily pockets.
- Don’t over-swirl: Too much mixing muddies the pattern and blends flavors into a single note.
- Don’t cut while hot: Warm brownies crumble and smear. Cooling sets the crumb and swirl.
Recipe Variations
- Salted crunch: Sprinkle flaky sea salt on top right after baking for contrast.
- Gluten-free: Swap the flour for a 1:1 gluten-free baking blend. Keep the batter slightly underbaked for best texture.
- Dark chocolate lovers: Use bittersweet (60–70%) chocolate and reduce granulated sugar by 2 tablespoons.
- Nut-free option: Use seed butter (like sunflower) and a chocolate spread made without hazelnuts.
- Espresso kick: Add 1 teaspoon instant espresso to the dry ingredients to deepen the chocolate flavor.
- Marbled cheesecake swirl: Skip Nutella, beat 4 oz softened cream cheese with 2 tbsp sugar and 1 egg yolk, and swirl it with the peanut butter.
- Peanut crunch: Fold in 1/3 cup chopped roasted peanuts for texture.
FAQ
Can I double the recipe?
Yes.
Bake in a 9×13-inch pan for 28–35 minutes. Start checking at 26 minutes and pull when the center is just set.
Which peanut butter works best?
Creamy, no-stir peanut butter gives the smoothest ribbons. If using natural peanut butter, stir thoroughly to incorporate the oil, and warm it slightly so it dollops easily.
How do I get shiny, crackly tops?
Whisk the eggs and sugar into the warm chocolate mixture until glossy.
That slight emulsification helps create the classic shiny crust.
Can I reduce the sugar?
You can cut up to 2–3 tablespoons without major changes. Much more than that will affect texture and the shiny top.
How do I know when the brownies are done?
The edges will be set and pulling slightly from the sides, and a toothpick inserted 2 inches from the edge comes out with moist crumbs. The center should look soft but not jiggly.
What if I only have a 9×9-inch pan?
Bake 5–8 minutes less and start checking early.
The brownies will be thinner and may bake faster.
Can I make these dairy-free?
Use a dairy-free butter alternative and a dairy-free chocolate bar or chips. Check that your chocolate-hazelnut spread is dairy-free, or use a suitable chocolate spread.
Why did my swirl sink?
If the spreads are too warm or the batter is too thin, swirls can settle. Cool the batter slightly and only warm the spreads until spoonable, not runny.
In Conclusion
Peanut Butter Nutella Swirl Brownies are everything a fudgy brownie should be—rich, shiny-topped, and packed with chocolate, with ribbons of nutty sweetness in every bite.
The method is simple, the ingredients are familiar, and the results look bakery-worthy. Whether you’re baking for a party or just treating yourself, this recipe delivers consistent, crowd-pleasing squares that store beautifully and taste even better the next day. Bake a batch, let them cool, and prepare for them to disappear.
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