One-Bowl Fudge Brownies with a Molten-Set Center

By Sprig Originals ✓ · cooked up in Sprig

The dense, glossy-topped brownie that shows up next to the fortune cookies — squat, almost truffle-like, and worth far more than the four dollars it usually costs. Everything happens in one bowl with melted butter: the hot butter blooms the cocoa for a deeper chocolate flavor, and the pan comes out of the oven while the center is still visibly underdone so it sets into pure fudge as it cools. No mixer, no chopping chocolate, about 12 minutes of actual work.

Ingredients

• 10 tbsp unsalted butter, cut into chunks
• 1 1/4 cup granulated sugar
• 2 tbsp packed light brown sugar
• 3/4 cup Dutch-process cocoa powder, plus 2 tbsp
• 3/4 tsp fine salt
• 2 tsp vanilla extract
• 2 large cold eggs
• 1 large cold egg yolk
• 1/2 cup all-purpose flour
• 3/4 cup semisweet chocolate chips

• 1/2 tsp flaky sea salt
• 1/3 cup toasted chopped walnuts

Instructions

1. Heat the oven to 325°F with a rack in the lower third. Line an 8x8-inch metal baking pan with two crossed strips of foil or parchment, leaving overhang on all four sides as a sling, and grease lightly.
2. Put the butter in a large microwave-safe bowl and melt it in 30-second bursts, about 1 to 1 1/2 minutes total, until fully liquid and hot to the touch. (Or melt in a small saucepan and pour into a large bowl.)
3. Immediately whisk the granulated sugar, brown sugar, cocoa powder, and fine salt into the hot butter. The mixture will look thick, grainy, and a little like wet sand — that is correct. Let it sit 5 minutes; the residual heat blooms the cocoa and dissolves some of the sugar.
4. Whisk in the vanilla. The batter should now feel warm, not hot — if it is above about 110°F, stir for another minute so you don't scramble the eggs.
5. Add one cold egg and whisk hard for 30 seconds until fully absorbed and glossy. Repeat with the second egg, then the yolk. Once all three are in, whisk vigorously for a full 45 to 60 seconds: this is what builds the thin, shiny, crackly top.
6. Switch to a rubber spatula. Add the flour all at once and fold just until no dry streaks remain, about 20 strokes — do not beat it. Fold in the chocolate chips and the walnuts, if using.
7. Scrape the batter into the pan and smooth the top; it will be thick and sludgy. Sprinkle with flaky salt if you like.
8. Bake 22 to 25 minutes, checking at 22. The edges should be set and slightly puffed, the center should still look damp and jiggle very faintly when you nudge the pan, and a toothpick inserted 1 inch from the edge should come out with thick wet crumbs. Pull it now — a clean toothpick means cakey brownies.
9. Set the pan on a rack and cool completely, at least 2 hours. This is not optional: the center finishes setting as it cools and that is where the fudge texture comes from.
10. Lift the brownies out by the sling, peel down the sides, and cut into 16 squares with a large knife wiped clean between cuts. For the densest, most truffle-like texture, chill the uncut slab 45 minutes before slicing and serve just below room temperature.

Chef's tips

Nutrition (per serving, estimated)

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