Lightly sweet and intensely chocolatey, Thomas Keller’s rich cocoa brownies (from Ad Hoc) are an indulgent treat that balances deep cocoa flavor with a tender, grown-up crumb.
I have to admit: I’m hooked on Thomas Keller recipes. Not long ago I shared his roasted chicken method, and now I find myself coming back to one of his simpler but utterly satisfying desserts — these cocoa brownies. They’re the kind of recipe that becomes a staple: straightforward to make, reliably delicious, and perfect for sharing or keeping all to yourself.
Brownies and Valentine’s Day make a natural pair, and these are especially good when you want something that feels rich without being overly sweet. Whether you’re baking for a special someone or treating yourself during a snow day, this version is a winner.
I tend to rotate a few favorite brownie recipes depending on the mood: dense, fudgy bars for chocolate overload; chewy brownies with a crackly top when I want texture; a kid-friendly, frostable one-bowl brownie for parties; and Thomas Keller’s Ad Hoc brownies when I want a deeper, more sophisticated cocoa flavor and a cakier bite.
What sets these brownies apart is the use of alkalized (Dutch-process) cocoa powder, which yields a darker, smoother chocolate note with less bitterness than natural unsweetened cocoa. Keller also incorporates chunks of semisweet chocolate so that warm brownies have pockets of melted chocolate — a delightful contrast of tender crumb and glossy bites of chocolate.
These brownies are lightly sweet, intensely chocolatey, and have a delicate texture that suits adults and serious chocolate lovers. The batter can be prepared ahead and chilled for up to a week before baking, making them convenient to plan for events or busy days.
If you’re aiming for the best texture, avoid overbaking: the brownies should be set but still slightly tender in the center when removed from the oven. Serve them slightly warm, dusted with powdered sugar if you like, or with a scoop of vanilla ice cream for an extra-special dessert.
Wishing you a happy baking day — and if a warm, tender brownie doesn’t say “I love you,” I don’t know what does.
Rich Cocoa Brownies (“Ad Hoc”)
By: Amanda Biddle
Summary: Lightly sweet and deeply chocolatey, Thomas Keller’s rich cocoa brownies are an indulgent yet refined dessert. The batter can be made ahead and refrigerated for up to a week before baking. Adapted, in language and procedure, from Thomas Keller’s Ad Hoc At Home.
Prep Time: 45 minutes | Cook Time: 45 minutes | Total Time: 1 hour 30 minutes
Servings: 12 (to 16 brownies)
Ingredients
- ¾ cup all-purpose flour
- 1 cup unsweetened alkalized (Dutch-process) cocoa powder
- ¾ pound (12 ounces) unsalted butter, cut into 1-inch pieces
- 1 teaspoon kosher salt
- 3 large eggs
- 1 ¾ cups granulated sugar
- ½ teaspoon vanilla extract
- 6 ounces semisweet chocolate chips (or a block of chocolate cut into chip-sized pieces)
- Powdered sugar, for dusting (optional)
Instructions
- Preheat the oven to 350°F (175°C).
- Butter a 9-inch baking pan and line it with parchment, leaving a 2-inch overhang on two sides for easy removal. Lightly butter the parchment. (If using a 9-inch silicone mold, lining and buttering are optional.)
- In a medium bowl, sift together the flour, cocoa powder, and salt. Set aside.
- Melt half of the butter (about 6 ounces) in the microwave or in a small saucepan. Place the remaining butter pieces in a medium bowl and pour the melted butter over them. Stir until almost all of the butter has melted and the mixture looks creamy. Stir in the vanilla extract.
- In a stand mixer fitted with the paddle attachment (or using a large bowl and an electric mixer), beat the eggs and sugar on medium speed until the mixture is thick and pale.
- With the mixer on low speed, add the sifted flour-cocoa mixture and the butter mixture in three additions, alternating between the dry and wet ingredients. Mix just until combined. Remove the bowl from the mixer and gently fold in the semisweet chocolate chips with a rubber spatula or wooden spoon.
- Spread the batter evenly in the prepared pan. Bake 40–45 minutes, or until a cake tester inserted into the center comes out clean or with only a few moist crumbs. If the tester appears coated with melted chocolate, test in another spot to avoid a false positive.
- Transfer the pan to a wire rack and cool for 20 minutes. Using the parchment overhang, lift the brownies from the pan to a cutting board. Slice into 16 squares or 12 rectangles, dust with powdered sugar if desired, and serve slightly warm.
Notes
* The original recipe calls for a block of chocolate cut into chip-sized pieces. Using high-quality semisweet chocolate chips works well and saves prep time.
** Keller uses a 9-inch silicone baking mold; if you use silicone, you can skip the parchment and buttering. Brownies baked in metal or glass will develop crisper edges.
*** For the best texture, do not overbake. Removing the brownies when a tester has a few moist crumbs ensures they remain tender rather than dry.
Nutrition Estimate
Calories: 362 kcal | Carbohydrates: 21 g | Protein: 4 g | Fat: 30 g | Saturated Fat: 18 g | Cholesterol: 102 mg | Sodium: 215 mg | Fiber: 3 g | Sugar: 9 g
Nutrition information is an estimate and should be used as a guideline only.
About this recipe: These brownies highlight the smooth richness of Dutch-process cocoa and the melting contrast of semisweet chocolate pieces. They’re best enjoyed slightly warm and are simple enough to prepare ahead for stress-free entertaining.