Dark Chocolate Brownie with Walnut and Milk Chocolate Drizzle

Headnote
This brownie is built for depth rather than excess: a dense, finely crumbed interior, a glossy top, and a measured bitterness from dark chocolate and cocoa. Walnut brings structure and a clean, nutty finish, while the milk chocolate drizzle softens the profile without dulling it. It is a compact dessert, precise in texture and restrained in sweetness.

Recipe essentials
Dish category: Dessert
Cuisine or origin: Contemporary European-style
Course type: Sweet baked confection
Yield: 1 brownie, 140 g total
Serving size: 1 portion
Prep time: 10 minutes
Cook time: 18 minutes
Total time: 28 minutes
Difficulty: Moderate

Equipment
Small mixing bowl
Heatproof bowl
Small whisk
Rubber spatula
Fine sieve
Small 10 cm square baking tin or equivalent mold
Parchment paper
Saucepan
Wire rack

Ingredients

Brownie batter
Sugar 32 g
Butter 28 g
Dark chocolate 22 g
Egg 20 g, lightly beaten
Vegetable oil 6 g
Vanilla extract 1 g
Wheat flour 16 g, sifted
Cocoa powder 7 g, sifted
Salt 0.5 g
Walnut 8 g, lightly chopped

Drizzle
Milk chocolate 10 g

Method

1. Heat the oven to 175°C. Line a small 10 cm square baking tin with parchment paper, leaving enough overhang to lift the brownie cleanly after baking.

2. In a heatproof bowl set over barely simmering water, melt the butter, dark chocolate, and vegetable oil together. Stir only until smooth and glossy, then remove from the heat. The mixture should be fluid and evenly dark, with no visible chocolate pieces.

3. Whisk in the sugar, then the beaten egg, followed by the vanilla extract. Whisk just until the mixture thickens slightly and becomes satiny. Do not aerate it heavily.

4. Fold in the sifted flour, cocoa powder, and salt with a spatula until no dry streaks remain. Add the chopped walnut and fold once more, keeping the batter dense and cohesive.

5. Scrape the batter into the prepared tin and level it with the spatula. Bake for 16 to 18 minutes, until the surface is set and lightly crackled, the edges are firm, and the center still yields a slight, controlled softness when pressed. The brownie should not be dry.

6. Remove from the oven and cool in the tin for 10 minutes, then lift out and cool completely on a wire rack. The crumb will settle and tighten as it cools.

7. Melt the milk chocolate gently over the same low heat or in short bursts of residual heat until smooth. Drizzle it sparingly over the cooled brownie in a fine, deliberate line.

Plating and serving
Cut into a single neat portion and place it slightly off center on a plain dessert plate. Present the brownie with the drizzle visible across the top, the walnut embedded within the crumb, and the edges clean. Serve at room temperature for the best contrast between the dense interior and the delicate finish.

Professional notes
Do not overbake; the brownie should remain moist and compact at the center. Keep the mixing brief once the flour is added, or the texture will turn firm rather than supple. The drizzle must remain restrained: it is an accent, not a covering.