Desserts
The America's Test Kitchen flourless chocolate cake delivers restaurant-quality fudgy texture without a single dry crumb. This recipe transforms simple ingredients into a dense, rich dessert that's foolproof for home bakers. The secret lies in precise mixing techniques and controlled baking that ensures perfect results every time.
What sets this cake apart is its velvety crumb and deep chocolate flavor that comes from high-quality cocoa powder and melted butter. Unlike traditional chocolate cakes, this version skips flour entirely, relying instead on eggs and cornstarch for structure.
The result? A moist, decadent slice that's impossible to resist without being overly sweet.
With just 10 ingredients and 45 minutes of active time, you'll achieve professional-level results. The cake bakes in a single layer, creating a rich center that remains tender while developing a slightly crisp exterior. This is the kind of dessert that elevates any dinner party or special occasion.
Perfect for chocolate lovers who crave texture without dryness, this recipe delivers consistent success. Whether you're baking for a crowd or treating yourself, the techniques here ensure every slice meets the same high standard. Let's get started on creating this showstopper dessert.
Ingredients for america's test kitchen flourless chocolate cake
Ten precise ingredients transform into America's Test Kitchen's signature flourless chocolate cake—rich, fudgy, and perfectly moist.
| Ingredient | Amount | Notes |
|---|---|---|
| Unsalted Butter 🧈 | 1 cup | Melted and cooled to 110°F |
| Extra-Dark Chocolate Chips 🍫 | 12 oz | 70% cocoa minimum, high-quality |
| Large Eggs 🥚 | 6 whole | Room temperature, separated |
| Granulated Sugar 🍚 | 1 ½ cups | Superfine preferred for smooth texture |
| Cornstarch 🌾 | ¼ cup | Lightly sifted for even distribution |
| Dutch-Processed Cocoa Powder 🍫 | ½ cup | High-fat, unsweetened preferred |
| Instant Espresso Powder ☕ | 1 tbsp | Enhances chocolate depth |
| Salt 🧂 | ½ tsp | Diamond Crystal preferred |
| Vanilla Extract 🌿 | 1 tbsp | Pure Madagascar preferred |
| Flaky Sea Salt 🧂 | ½ tsp | For finishing, Maldon preferred |
The cocoa powder and butter are non-negotiable for authentic depth. Valrhona or Callebaut chocolate delivers the highest fat content, essential for that signature fudgy texture. Whole Foods or specialty baking stores carry these premium brands, though Ghirardelli 72% chips work well in a pinch. The cornstarch acts as your structural binder—Bob's Red Mill is a reliable brand for consistent results. For the cocoa powder, Dutch-processed is critical—it dissolves smoothly without bitterness. Pro tip: Toast your cocoa powder in a dry pan for 2 minutes to deepen the flavor before mixing.
No instant espresso powder? 1 tbsp finely ground coffee beans works in a bind, but the powder dissolves more evenly. Substituting regular cocoa powder for Dutch-processed? Add 1 tsp baking soda to mimic the alkalinity. The eggs must be room temperature—cold eggs create air pockets that disrupt the dense texture. For a lighter crumb, separate yolks and whites, whip whites to stiff peaks, then fold gently. The vanilla extract should be pure—imitation extracts contain alcohol that can dry out the cake. If you're using vanilla beans, scrape 1 bean for equivalent flavor.
Store the cake in an airtight container at room temperature for up to 3 days—it actually improves overnight as flavors meld. For longer storage, wrap tightly in plastic and refrigerate for 1 week. The cake freezes beautifully: slice before freezing and thaw at room temperature for 30 minutes. To reheat, microwave individual slices for 10-15 seconds. For serving, dust with powdered sugar or sprinkle with flaky Maldon salt for contrast. The cake's dense nature means it reheats best—never microwave straight from the fridge.
Why You'll Love This Recipe
- Here’s what sold me: bake it ahead for a party, then store it at room temp for up to three days. The texture actually improves with time—more fudgy, less cakey. I’ve used it for birthdays, last-minute date nights, and even as a "I’m tired of takeout" dinner. Zero effort, maximum wow.
- No Mixing Madness: I swear by this recipe because it’s basically a "melt and fold" operation—just butter, chocolate, and eggs. No sifting, no folding in air, no stress. The cornstarch keeps it light without overworking the batter, and honestly? That’s my kind of baking.
- Rich Without Guilt: The extra-dark chocolate chips melt into a velvety, fudgy center that’s so intense it feels indulgent, but the sugar and eggs balance it just enough to keep it from being too heavy. Between us, this cake tastes like a $15 dessert but costs a fraction—because butter and chocolate are my budget’s best friends.
- Make-Ahead Magic: Here’s what sold me: bake it ahead for a party, then store it at room temp for up to three days. The texture actually improves with time—more fudgy, less cakey. I’ve used it for birthdays, last-minute date nights, and even as a "I’m tired of takeout" dinner. Zero effort, maximum wow.
Step-by-step instructions for america's Test Kitchen flourless chocolate cake
This method delivers a perfectly fudgy, crack-free center every time—no dry crumbs in sight.
Prepare the Chocolate Base
In a medium heatproof bowl, combine the 1 cup unsalted butter and 12 oz extra-dark chocolate chips. Place the bowl over a saucepan of simmering water, ensuring the bottom doesn't touch the water. Stir gently until the mixture melts completely and reaches 110°F, then remove from heat. This gentle melting ensures the chocolate develops a silky texture without seizing.
In a separate bowl, whisk together the 1.5 cups granulated sugar, 0.5 cup dutch-processed cocoa powder, 1 tbsp instant espresso powder, and 0.5 tsp salt until fully combined. The espresso powder enhances the chocolate's depth, while the cocoa powder ensures rich color and moisture retention. Sift the dry ingredients lightly to prevent clumping in the final batter.
Incorporate Eggs and Vanilla
Add the 6 whole large eggs one at a time to the melted chocolate mixture, whisking vigorously after each addition until fully incorporated. This gradual addition prevents the eggs from scrambling in the hot chocolate. Stir in the 1 tbsp vanilla extract and the previously mixed dry ingredients, whisking until smooth and homogeneous. The batter should be thick but pourable—this consistency is critical for achieving the signature fudgy texture.
Here's the thing—don't rush this step. The batter needs to rest for 10 minutes at room temperature to allow the cornstarch to fully hydrate and the flavors to meld. This resting period also makes the cake easier to handle when baking. Cover the bowl loosely with plastic wrap and let it sit while you prepare your baking pan.
Bake for Perfect Texture
Preheat your oven to 350°F. Generously grease a 9-inch round cake pan with additional butter or line it with parchment paper for easy removal. Pour the batter into the prepared pan and smooth the top with a spatula. Tap the pan gently on the counter to release any air bubbles trapped in the batter.
Bake for 35-40 minutes until the edges are set and a toothpick inserted in the center comes out with moist crumbs but no wet batter. The cake should spring back slightly when pressed gently in the center—this indicates it's fully baked but still fudgy. Overbaking is the enemy of this recipe; it leads to dryness and cracks. If unsure, err on the shorter side and let it rest before checking again.
Finish and Rest
Remove the cake from the oven and let it cool in the pan for 10 minutes. This brief resting period prevents the cake from collapsing when transferred. Run a thin knife around the edges to loosen it, then invert onto a wire rack to cool completely. The cake will continue to set as it cools, developing its signature dense, fudgy texture.
Once completely cooled, dust the top with the 0.25 cup cornstarch and sprinkle evenly with the 0.5 tsp flaky sea salt. The cornstarch creates a delicate, snowy finish, while the flaky salt adds a sophisticated contrast to the rich chocolate. Slice with a warm knife for clean cuts and serve at room temperature for the best texture. Each slice should be dense, moist, and crack-free—proof of this method's success.
Pro Tips For Making America'S Test Kitchen Flourless Chocolate Cake
- Preheat to 375°F: DESCRIPTION: The recipe calls for 375°F, but don’t cut corners—let that oven scream hot for at least 20 minutes before baking. I learned this the hard way when my cake started as a dome and ended as a sad, uneven puddle. That extra time guarantees even heat distribution, which is non-negotiable for this dense cake.
- Chop Chocolate Coarsely: DESCRIPTION: Skip the fine chopping—break those extra-dark chocolate chips into rough, uneven chunks (about ½-inch pieces). The recipe relies on slow melting, and larger pieces create pockets of gooey, luxurious chocolate that store-bought chunks can’t match. Yes, even if it looks messy.
- Don’t Overmix the Eggs: DESCRIPTION: After adding the sugar, mix the eggs just until combined—no streaks, no overbeating. I used to whip them like egg whites, and the cake turned dense and rubbery. The recipe depends on gentle folding to keep it tender, so resist the urge to go full speed.
- Test for Doneness at 145°F: DESCRIPTION: The cake’s internal temp should hit 145°F before pulling it out—not when the top looks set. I’ve seen cakes that looked done at 140°F but were still gummy inside. A thermometer is your friend here; trust it over your eyes.
Essential equipment for america's test kitchen flourless chocolate cake
Precision Mixing Tools
Start with a high-quality whisk—I recommend the OXO Good Grips silicone whisk—for blending your dry ingredients smoothly. The whisk's angled wires prevent clumping when mixing the cocoa powder, sugar, and cornstarch.
For the chocolate base, use a medium heatproof mixing bowl (like Pyrex) to melt the butter and chocolate over a double boiler. A digital kitchen scale ensures accurate measurements for the sugar and cocoa powder, which are critical for texture. 💡
Baking Essentials
A 9-inch round cake pan with removable bottom (like Wilton Perfect Results) is a game-changer for this recipe. Line it with parchment paper to prevent sticking, or use a nonstick spray like Baking King for extra insurance.
For temperature control, invest in an oven thermometer—I use the Thermoworks Oven Thermometer—to confirm your oven hits 350°F accurately. Uneven heat distribution is the #1 cause of cracks in flourless cakes.
Cooling and Finishing
After baking, transfer the cake to a wire cooling rack (I prefer the Nordic Ware Half Moon) to cool completely. This prevents soggy bottoms and ensures clean slices.
For the finishing touch, use a fine-mesh sieve to dust the cornstarch evenly, and a Maldon flaky salt sprinkler for that gourmet contrast. A serrated knife (like Mercer Culinary Genesis) gives the cleanest cuts through the dense texture. 🧂
Optional Pro Upgrades
For extra precision, a stand mixer with a whisk attachment (like KitchenAid Artisan) makes blending the batter effortless, especially for larger batches. If you love chocolate experiments, a melting pot (such as the Cuisinart 3-in-1) gives you better temperature control for the chocolate base.
For storage, vacuum-sealed bags (like FoodSaver) preserve freshness for up to 5 days at room temperature.
Budget-Friendly Swaps
No fancy tools? A wooden spoon works for mixing dry ingredients, and a standard mixing bowl suffices for the chocolate base. Use aluminum foil to create a makeshift double boiler if needed.
For the pan, a well-seasoned cast-iron skillet (like Lodge) can double as a baking vessel in a pinch—just grease it generously. The key is attention to detail, not expensive equipment.
Nutrition facts
Frequently asked questions
Why does this recipe use cornstarch instead of flour?
Cornstarch creates a denser, fudgier texture without adding gluten that could make the cake dry. It also helps bind the rich chocolate mixture while keeping the crumb ultra-moist. The 0.25 cup used here is the magic amount for that signature velvety consistency—flour would introduce dryness and crumbly texture.
What's the secret to preventing cracks in the center?
Three key factors: 350°F oven temperature (no higher!), baking for exactly 35-40 minutes, and letting the cake cool in the pan for 10 minutes before transferring. Overbaking by even 5 minutes causes cracks—always check with a toothpick that comes out with moist crumbs. The resting period prevents sudden temperature shifts that trigger structural stress.
Can I substitute regular cocoa powder for Dutch-processed?
Yes, but add 1 tsp baking soda to mimic Dutch-processed cocoa's alkalinity. Regular cocoa lacks the smooth dissolving properties that prevent bitterness and clumping. For best results, use high-fat cocoa powder (like Valrhona or Callebaut) to maintain the fudgy texture. The espresso powder won't work as effectively with regular cocoa since it lacks the same flavor profile.
How do I make this cake even more decadent?
Try these pro upgrades: Fold in 1/2 cup toasted hazelnuts for nutty depth, or add 1 oz melted white chocolate to the batter for a marbled effect. For extra richness, replace 2 tbsp butter with 2 tbsp brown butter—the caramelized flavor elevates the chocolate. Chill the batter for 1 hour before baking to intensify flavors.
Why does my cake taste bitter?
Bitterness usually comes from overmixing the batter (which develops gluten) or using low-quality chocolate chips (below 70% cocoa). Always melt butter and chocolate together to 110°F—hotter temps burn the chocolate. For extra insurance, reduce the cocoa powder to 0.4 cup and add 1 tbsp more sugar to balance flavors.