Quick Recipe Version (TL;DR)

Yield: 16 brownies
Prep Time: 20 minutes
Cook Time: 30 minutes
Total Time: 55 minutes (plus cooling time recommended)

Quick Ingredients

3/4 cup (170 g) unsalted butter
6 oz (170 g) dark chocolate (60–70%), chopped
1 cup (200 g) granulated sugar
1/2 cup (100 g) packed light brown sugar
3 large eggs, room temperature
2 tsp pure vanilla extract
3/4 cup (95 g) all-purpose flour
1/4 cup (25 g) unsweetened cocoa powder
1/2 tsp fine sea salt
1 cup (100 g) walnuts, toasted and chopped
Vanilla ice cream, for serving

Do This

1) Heat oven to 350°F (175°C). Line an 8-inch square metal pan with parchment and lightly grease.
2) Melt butter and chopped dark chocolate together until smooth; let cool slightly.
3) In a bowl, vigorously whisk sugars and eggs for 2–3 minutes until thick and glossy, then whisk in vanilla.
4) Whisk in the warm chocolate mixture. Sift in flour, cocoa, and salt; fold gently just until no dry spots remain.
5) Fold in chopped toasted walnuts. Spread thick batter evenly in pan.
6) Bake 28–32 minutes, until edges are set and a toothpick comes out with moist, fudgy crumbs.
7) Cool in pan at least 30–45 minutes, slice into squares, and serve warm with scoops of vanilla ice cream on top.

Why You’ll Love This Recipe

Ultra-fudgy center with a delicate, shiny crackle top that looks bakery-quality.
Deep chocolate flavor from both real dark chocolate and cocoa powder.
Toasty walnuts add crunch and balance the richness, especially under melting vanilla ice cream.
Simple, one-pan batter with basic ingredients you probably already have.

Grocery List

Produce: Optional: fresh berries and mint leaves for serving
Dairy: Unsalted butter, eggs, vanilla ice cream
Pantry: Dark chocolate (60–70%), granulated sugar, light brown sugar, all-purpose flour, unsweetened cocoa powder, fine sea salt, walnuts, vanilla extract

Full Ingredients

For the Extra-Fudgy Brownies

3/4 cup (170 g) unsalted butter, cut into pieces
6 oz (170 g) dark chocolate (60–70% cacao), finely chopped
1 cup (200 g) granulated sugar
1/2 cup (100 g) packed light brown sugar
3 large eggs, at room temperature
2 tsp pure vanilla extract
3/4 cup (95 g) all-purpose flour, spooned and leveled
1/4 cup (25 g) unsweetened cocoa powder (natural or Dutch-process)
1/2 tsp fine sea salt (or 1/4 tsp table salt)
1 cup (100 g) walnuts, lightly toasted and coarsely chopped
Optional: 1 tsp instant espresso powder (enhances chocolate flavor; does not make it taste like coffee)

For Serving

Vanilla ice cream (about 1–1 1/2 quarts for 16 servings)
Optional garnish: extra chopped walnuts, chocolate shavings, fresh berries, mint leaves

Step-by-Step Instructions

Step 1: Prepare the pan and preheat the oven

Preheat your oven to 350°F (175°C) with a rack in the center position. Line an 8-inch (20 cm) square metal baking pan with parchment paper, leaving an overhang on two sides to create a sling. This makes it very easy to lift the brownies out for clean slicing. Lightly grease the exposed sides of the pan and the parchment with butter or nonstick spray.

Using a metal pan is ideal for brownies: it conducts heat more evenly and helps build that shiny crackle top and chewy edges. If you only have glass or ceramic, lower the oven temperature to 325°F (165°C) and expect to add a few extra minutes of baking time.

Step 2: Toast and chop the walnuts

For the best flavor and crunch, toast the walnuts before adding them to the batter. Spread 1 cup (100 g) walnuts in a single layer on a baking sheet. Toast in the preheated oven for 6–8 minutes, stirring once halfway through, until they smell fragrant and look lightly darker. Let them cool, then coarsely chop. You want some small bits and some larger pieces for varied texture in each bite.

If your walnuts are already roasted, you can skip to chopping. Set aside while you make the brownie batter.

Step 3: Melt the butter and chocolate

Place the butter pieces and chopped dark chocolate into a medium heatproof bowl. Set the bowl over a saucepan of barely simmering water (do not let the bowl touch the water), creating a makeshift double boiler. Stir gently but constantly until the butter and chocolate are completely melted and smooth. Alternatively, microwave in short 20–30 second bursts, stirring between each burst, until melted.

Remove from heat and set aside to cool slightly for 5–10 minutes. The mixture should be warm to the touch but not hot; if it is too hot when you add the eggs, it can scramble them and affect the texture.

Step 4: Whisk eggs and sugars for a crackly top

In a large mixing bowl, combine the granulated sugar, brown sugar, and eggs. Using a handheld electric mixer on medium-high speed (or a very vigorous whisking arm), beat for 2–3 minutes until the mixture thickens, turns a lighter shade, and becomes glossy. This step is important: it helps create that signature shiny, crackled crust on top of the brownies.

Whisk in the vanilla extract and, if using, the instant espresso powder until just combined. The mixture should be silky and slightly ribbons off the whisk when lifted.

Step 5: Combine with the chocolate mixture

Slowly pour the warm (not hot) melted chocolate and butter mixture into the whipped egg-sugar mixture, whisking continuously on low speed or by hand. Continue until you have a smooth, uniform batter with no streaks. Take your time here; you want everything to be completely blended without knocking out too much of the air you just whipped in.

Once combined, stop mixing. Overmixing from this point forward can make the brownies more cakey instead of fudgy.

Step 6: Fold in dry ingredients and walnuts

In a separate small bowl, whisk together the flour, cocoa powder, and salt to break up any lumps. Sift or sprinkle this dry mixture evenly over the wet batter. Using a spatula, gently fold just until you no longer see dry patches of flour or cocoa. Scrape along the bottom and sides of the bowl to catch any hidden pockets of dry ingredients.

Fold in the chopped toasted walnuts, reserving a small handful to sprinkle on top if you like a more decorative look. The batter will be very thick and glossy; this is exactly what you want for ultra-fudgy brownies.

Step 7: Bake to fudgy perfection

Scrape the batter into the prepared pan and spread it evenly into the corners with your spatula. If desired, sprinkle the reserved walnuts over the top and gently press them in.

Bake at 350°F (175°C) for 28–32 minutes. Start checking at 26 minutes: the edges should look set and slightly pulled away from the pan, and the center should be just set but still soft. Insert a toothpick or thin knife about 2 inches from the edge; it should come out with a few moist, fudgy crumbs, not completely clean and not wet with batter. Do not overbake, or the brownies will lose their gooey center.

Step 8: Cool, slice, and serve with ice cream

Place the pan on a wire rack and let the brownies cool in the pan for at least 30–45 minutes. For very clean squares, cool completely for about 1–2 hours. Use the parchment sling to lift the entire slab of brownies out of the pan, then transfer to a cutting board.

Use a sharp knife to cut into 16 squares (4 by 4). Wipe the knife clean between cuts for neat edges. Serve the brownies slightly warm or at room temperature, topped with generous scoops of vanilla ice cream. The cold, creamy ice cream will slowly melt over the warm, fudgy brownies, pooling into the crackly top and walnut-studded center for the ultimate dessert experience.

Pro Tips

Do not overbake. The difference between gooey and dry is just a few minutes. Pull them when the center is just set and the toothpick has moist crumbs.
Room-temperature eggs matter. Cold eggs do not whip as well with sugar and can reduce the shiny top. If needed, place eggs in warm water for 5–10 minutes before using.
Whip the eggs and sugar thoroughly. That 2–3 minutes of mixing is key for the glossy, crackled crust. The mixture should look thick and slightly pale.
Use good-quality chocolate. Because chocolate is the main flavor, choose a dark chocolate bar (60–70%) you enjoy eating on its own.
Chill for super-clean slices. For perfect, bakery-style squares, chill the cooled brownie slab in the fridge for 30–60 minutes, then slice and bring back to room temp before serving.

Variations

Salted caramel swirl: Dollop 1/3–1/2 cup of thick salted caramel sauce over the batter in the pan. Use a knife to gently swirl it through before baking. Sprinkle a pinch of flaky sea salt on top after baking.
Mocha walnut brownies: Increase instant espresso powder to 2 tsp and top warm brownies with coffee ice cream instead of vanilla for a rich mocha twist.
Peanut butter swirl (no nuts): Omit the walnuts. Warm 1/3 cup creamy peanut butter until pourable, then drizzle and swirl it over the top of the batter before baking.

Storage & Make-Ahead

Once completely cool, store brownies in an airtight container at room temperature for up to 3 days. For slightly longer storage (up to 5 days), keep them well sealed in the refrigerator and let them come to room temperature before serving, or warm briefly in the microwave for 10–15 seconds.

To freeze, wrap individual squares tightly in plastic wrap, then place them in a freezer bag or airtight container. Freeze for up to 2 months. Thaw at room temperature for about 1 hour, or warm from frozen in the microwave in 15-second bursts until soft and fudgy. Add vanilla ice cream just before serving.

Nutrition (per serving)

Approximate values per brownie (1 of 16), without ice cream: about 280 calories; 18 g fat; 29 g carbohydrates; 2 g fiber; 22 g sugar; 4 g protein; 150 mg sodium. Actual values will vary based on brands used and portion size, and adding ice cream will increase calories, sugar, and fat.

Extra Fudgy Walnut Brownies With Shiny Crackle Tops