Fudgy Miso Brownies with Brown Butter

Miso often shows up in soup, but its real talent is in its ability to add depth to just about anything, including sweet treats like brownies. Red miso, which is aged for longer, tastes like roasted nuts with earthy caramel notes once you get past that first hit of salt, and that makes it a natural partner for dark chocolate. Pastry chefs have been slipping it into caramels and cookies for years for exactly this reason.

Here it does two things at once. The salt keeps the sugar in check so the brownies never tip into cloying, and its umami rounds out the chocolate so it tastes deeper and more grown-up. Add browned butter, cooked until it smells like toasted hazelnuts, and you get the kind of nutty richness you’d expect off a restaurant menu. Fudgy in the middle, with crumbly crisp edges, they vanish off the plate while they’re still a little warm.

Why This Recipe Works

• Aged red miso balances and contrasts — Every brownie needs something to keep the sugar from tasting flat, and miso brings that balancing salt plus a savory, nutty umami that makes the chocolate taste deeper and more satisfying.
• Browned butter for depth — Cooking the butter until the milk solids turn golden gives it a toasty, hazelnut aroma that brings out more complexity in both the chocolate and miso. Pouring the hot butter over the chocolate melts it without requiring a double boiler.
• Adjust the texture with time — Pulling the pan while the center is still a little wet ensures the middle stays gooey while the edges take on a crisp crumb. A few minutes either way slides you toward fudgy or more cake-like, so you can dial it in how you like it.

Key Ingredients

• Aged Red Miso — This is the flavor that sets these brownies apart. Its longer fermentation gives the fermented soybean paste a darker, almost caramel-like savoriness, and its salt balances the sugar so the brownies stay rich without becoming cloying. The trick is to add just enough to give you that nutty depth without making it taste salty.
• Dark chocolate — I use a 66% cacao dark chocolate, which gives a deep chocolate flavor that stands up to the miso. Drop to a 40% milk chocolate for something sweeter and milder, or go to 70% and above if you want a more intense, bittersweet edge.
• Dutch-processed cocoa powder — Dutch-processed cocoa is treated to neutralize its natural acidity, which gives it a darker color and mellows its sharpness into a rounder, earthier flavor that’s more chocolatey.
• Cultured butter — The word “cultured” here just means the cream used to make the butter has been fermented with bacterial cultures before being churned. This gives it a higher diacetyl content, which is what makes butter taste buttery.

How to Make Fudgy Miso Brownies

Move an oven rack to the center position and preheat, then line a square baking pan with parchment so you can lift the whole slab out later in one piece. Sift the dry ingredients into a large bowl and whisk so they are evenly distributed.

Put the chocolate and the miso in a heatproof bowl, and set it aside. Melt the butter in a light-colored saucepan over medium heat, stirring as it goes, and keep cooking past the point where the sizzling subsides. The milk solids will start to turn golden and the whole kitchen will smell like toasted nuts. That’s your cue.

SCIENCE: That nutty aroma comes from the milk solids browning, the same Maillard reaction that browns a steak. A light-colored pan lets you see the color to know when to stop before the milk solids burn and turn bitter.

Pour the hot browned butter straight over the chocolate and miso and let it sit for a few seconds, then stir until the chocolate is completely melted and the mixture is glossy and smooth.

Whisk the sugar and eggs into the chocolate mixture until it’s smooth and uniform in color. Pour this mixture into the dry ingredients and fold it gently, stopping the moment no dry streaks remain.

Scrape the batter into the pan and spread it into an even layer. Bake until the edges look set but the center is still a little soft and glossy.

TIP: Pull them on the early side for a gooey, fudgy center, or give them a few more minutes for a firmer, cakier crumb. Keep in mind that carryover heat keeps cooking the middle after the pan comes out of the oven.

Let the miso brownie cool in the pan until it firms up before removing it and cutting it into squares to serve.

Serve This With

These are hard to beat while they’re still slightly warm, with a cold glass of milk or a cup of coffee. If you want to lean all the way into indulgence, drizzle the brownies with a warm miso caramel sauce, or serve each square with a scoop of miso ice cream. Either way you turn this bakery treat into something that’s restaurant-worthy.