Desserts
King Arthur’s flourless chocolate cake recipe delivers a decadent dessert with a crispy top edge and fudgy depth—just five ingredients and a water bath stand between you and showstopping perfection. King Arthur's high-quality cocoa elevates this classic, delivering rich, velvety layers that taste like a decadent chocolate bar.
The secret lies in precise technique—melting butter and eggs together just right to create a dense yet moist crumb.
What sets this recipe apart is the contrast between the crispy exterior and the fudgy interior, achieved through careful baking in a water bath. This method ensures even heat distribution, preventing cracks while developing that coveted caramelized crust.
The cake's deep chocolate flavor comes from using high-quality cocoa, and the texture remains moist for days when stored properly.
This dessert is perfect for special occasions or when you crave something indulgent yet simple to prepare. The rich, bittersweet notes make it ideal for pairing with berries, whipped cream, or a dusting of powdered sugar. Once you try this version, store-bought flourless cakes won't compare.
The beauty of this recipe is its versatility—add a splash of espresso for intensity or orange zest for brightness, depending on your preference. With just 30 minutes of active time and 45 minutes of baking, you'll have a restaurant-worthy dessert that impresses every time.
Let's get started on creating this luxurious treat.
Ingredients for king arthur flourless chocolate cake
Five luxurious ingredients create this showstopping dessert with perfect crispy edges and velvety fudgy layers.
| Ingredient | Amount | Notes |
|---|---|---|
| Unsalted Butter 🧈 | 1 ½ cups | Cold, cut into 1-inch cubes |
| King Arthur High-Quality Cocoa Powder 🍫 | 1 cup | Natural or Dutch-processed preferred |
| Large Eggs 🥚 | 6 whole | Room temperature for even mixing |
| Granulated Sugar 🍚 | 1 ½ cups | Superfine preferred for smoother texture |
| Vanilla Extract 🌿 | 1 tbsp | Pure Madagascar bourbon preferred |
| Fine Sea Salt 🧂 | ½ tsp | Diamond Crystal preferred for balance |
| Dark Chocolate Chips 🍫 | 1 cup | 70% cocoa or higher for intensity |
| Powdered Sugar 🍚 | ¼ cup | For dusting, optional garnish |
| Fresh Berries 🍓 | 1 cup | Raspberries or blackberries for pairing |
The King Arthur cocoa powder is non-negotiable here—its high fat content and deep flavor are what create that decadent chocolate bar texture. Buy it directly from King Arthur’s website or find it at specialty baking stores; the difference in quality is noticeable. For the butter, European-style unsalted (like Plugrá or Miyoko’s) adds richness, but standard unsalted works fine. The eggs must be room temperature—cold eggs create air pockets that disrupt the dense crumb. If you’re using superfine sugar, you’ll need slightly more volume than granulated, so adjust accordingly. The dark chocolate chips add an extra layer of fudginess that’s hard to resist.
No cocoa powder? Melted dark chocolate (10 oz) plus 1 tbsp cocoa powder works as a substitute, though the texture will differ slightly. Short on vanilla? Seeds from one vanilla bean or even a dash of espresso powder (½ tsp) can enhance the chocolate flavor. For the berries, freshly washed raspberries or blackberries are ideal, but frozen works in a pinch—just thaw and drain well. The powdered sugar is optional but recommended for that final touch of elegance. If you’re feeling adventurous, add a pinch of orange zest or espresso powder to the batter for a sophisticated twist.
This cake keeps beautifully—3-4 days at room temperature in an airtight container, or up to 2 weeks refrigerated. For longer storage, wrap tightly in plastic and freeze for up to 3 months. Let it come to room temperature before serving to preserve that perfect contrast between crispy top and fudgy interior. Slice with a warm knife for cleaner cuts, and always dust with powdered sugar just before serving to highlight the caramelized crust.
Why You'll Love This Recipe
- No-Fuss Mixing: I swear by this recipe because it’s just three bowls—no sifter, no weird ratios. Melt butter, whisk eggs with sugar, fold in that King Arthur cocoa powder, and boom. The eggs do all the heavy lifting, so even if you rush, it still comes out rich and fudgy.
- Decadent Without Guilt: That high-quality cocoa powder from King Arthur? It’s the secret weapon—deep, bittersweet, and not at all like the dusty powder you’ve used before. The butter and vanilla make it taste like a bakery slice, but with half the sugar (and zero flour to weigh you down).
- Date Night Ready: Serve it warm with a scoop of vanilla ice cream, or let it cool for a slice that’s so dense, it feels luxurious. No one will guess it’s basically a cross between a brownie and a pudding cake—just pure, satisfying chocolate. (Yes, even on a Tuesday night.)
- Leftovers? Best Part: This cake actually improves the next day—more compact, more intense flavor. I’ve sent slices to work in a thermos, packed them for road trips, and even reheated them in the microwave (don’t tell anyone). Five ingredients, endless seconds.
Step-by-step instructions for King Arthur flourless chocolate cake recipe
Master this elegant dessert with a dense, fudgy interior and a signature crispy top edge—every detail matters.
Preheat and Prepare the Pan for Perfect Crisp
Preheat your oven to 350°F and position a rack in the lower-middle position. Generously butter a 9-inch springform pan using all 1.5 cups unsalted butter, then dust it thoroughly with 1 cup King Arthur High-Quality Cocoa Powder, tapping out any excess. This creates a nonstick barrier that prevents sticking and enhances the crispy edge. The cocoa powder also infuses flavor into the butter, amplifying the chocolate intensity throughout.
Line the bottom of the pan with parchment paper for easy removal. The butter and cocoa coating should be uniform—any missed spots will result in cake pulling away from the pan. I press a folded paper towel into the corners to ensure full coverage, especially where the cake will touch the sides. This step is non-negotiable for achieving that signature crispy top edge.
Melt Butter and Whisk Wet Ingredients
In a heavy-bottomed saucepan, melt the 1.5 cups unsalted butter over medium-low heat, stirring occasionally until it reaches 160°F—just below a simmer. Remove from heat and let it cool slightly to 140°F to prevent scrambling the eggs. In a separate heatproof bowl, whisk together the 6 whole large eggs and 1.5 cups granulated sugar until the mixture lightens and triples in volume, about 5 minutes. This step is critical for incorporating air, which creates the cake's signature tenderness.
Gradually pour the melted butter into the egg mixture while whisking constantly. Add the 1 tbsp vanilla extract and 0.5 tsp fine sea salt, whisking until fully combined. The mixture should be smooth and glossy, with no visible streaks of butter. If you notice any lumps, strain the batter through a fine-mesh sieve to ensure a silky texture. This preparation guarantees a velvety crumb without any graininess.
Fold in Cocoa and Chocolate for Richness
Sift in the 1 cup King Arthur High-Quality Cocoa Powder and gently fold it into the batter using a rubber spatula, working from the bottom up to minimize air pockets. The batter will thicken noticeably as the cocoa absorbs. Next, fold in the 1 cup dark chocolate chips by hand, ensuring even distribution. Avoid overmixing—just until the chocolate is evenly dispersed throughout the batter.
This is where the cake's depth of flavor comes together. The combination of cocoa powder and dark chocolate chips creates layers of intensity, from bittersweet to rich and velvety. The folding technique preserves the air incorporated earlier, which is essential for the cake's lightness despite its dense appearance. If the batter looks too thick, you can gently tap the bowl on the counter to help it settle.
Bake Until Set with Crispy Edge
Pour the batter into the prepared pan and smooth the top with a spatula. Bake for 40-45 minutes until the edges are set and the top is deeply cracked with a crispy edge. The center should still appear slightly soft—this is normal and ensures a fudgy interior. To check doneness, insert a toothpick; it should come out with moist crumbs, not wet batter. The cake will continue to set as it cools, so don't overbake.
During the last 5 minutes of baking, turn the oven to broil to intensify the crispy edge. Keep a close eye on it—this high heat can cause the top to brown quickly. Once the cake is done, transfer it to a wire rack and let it cool completely in the pan for 1 hour. This gradual cooling prevents cracking and allows the cake to set properly for clean slices.
Dust and Serve with Fresh Berries
Once fully cooled, release the springform pan and dust the top generously with the 0.25 cup powdered sugar using a fine-mesh sieve. This step adds a delicate sweetness and enhances the visual appeal. Arrange the 1 cup fresh berries (raspberries or blackberries) on top or alongside for a vibrant contrast to the deep chocolate. The berries add a bright acidity that cuts through the richness of the cake.
Slice the cake with a hot knife—dip it in hot water and wipe dry between slices—to ensure clean cuts. Each slice should reveal a dense, fudgy interior with a crispy top edge that offers satisfying texture. Serve at room temperature for the best experience, and store any leftovers in an airtight container at room temperature for up to 3 days or refrigerated for up to 5 days. The cake's flavor actually improves as it sits, allowing the ingredients to meld further.
Pro Tips For Making King Arthur Flourless Chocolate Cake
- Melt Butter Slowly: I learned this the hard way—dumping cold butter into hot sugar causes lumps that never fully blend, even with vigorous mixing. Instead, melt the butter first (just until it turns liquid, not brown), then let it cool slightly before adding to the sugar. The mixture will come together smoother, and your cake won’t fight you.
- Sift the Cocoa Twice: King Arthur’s cocoa is already high-quality, but clumps sneak in during storage. Sift it before measuring and again after mixing it into the wet ingredients. This guarantees a velvety texture—no gritty surprises when you slice. (Yes, even if you’re impatient like me.)
- Room-Temp Eggs Matter: Cold eggs won’t emulsify properly, leading to a dense, heavy cake. Pull them out of the fridge 30 minutes before using, or better yet, place them in warm water for 10 minutes. The batter will be lighter, and the crumb will be airy—trust the process.
- Don’t Overmix the Batter: This isn’t the prettiest method, but it’s the tastiest: Mix the wet ingredients until just combined, then fold in the dry ingredients by hand with a spatula. Overmixing with an electric mixer adds gluten (even without flour) and makes the cake tough. Stop when there are a few streaks of cocoa left—your future self will thank you.
Dietary considerations for this dish
Gluten-Free Adaptation
This recipe is already gluten-free, but for extra insurance, I recommend using King Arthur gluten-free flour blend if substituting any ingredients. The beauty of this cake lies in its simplicity—no gluten means no need for complex substitutions.
The natural richness of the butter, eggs, and cocoa creates a dense, fudgy texture that stands up beautifully without gluten. For those with gluten sensitivities, this cake is a safe and delicious choice. 💫
Nut-Free Considerations
The original recipe is naturally nut-free, but always double-check your King Arthur cocoa powder and dark chocolate chips for cross-contamination warnings. I prefer brands like Enjoy Life Foods for chocolate chips to ensure they’re processed in nut-free facilities.
The absence of nuts makes this cake ideal for those with allergies, while still delivering that luxurious chocolate experience.
Dairy-Free Substitutions
For a dairy-free version, replace the 1.5 cups unsalted butter with 1.5 cups dairy-free margarine (like Miyoko’s or Earth Balance) or 1.5 cups coconut oil, melted and cooled to 140°F. The texture will be slightly different—more tender but still fudgy.
Use dairy-free dark chocolate chips (like Pascha or Lily’s) to maintain the rich flavor. The cake will still achieve that crispy top edge, though the richness may be slightly less pronounced.
Vegan Adaptations
To make this cake vegan, swap the 6 eggs for ½ cup aquafaba (chickpea brine) or a flax egg substitute (3 tbsp ground flaxseed + 9 tbsp water). Replace the butter with 1.5 cups vegan butter (like Miyoko’s) or coconut oil.
Use dairy-free chocolate and ensure your vanilla extract is vegan-certified. The texture will be denser but still fudgy, and the crispy top edge remains achievable with careful baking. 🌱
Sugar-Free Option
For a sugar-free version, replace the 1.5 cups granulated sugar with 1.5 cups granulated erythritol or monk fruit sweetener (like Lakanto). The cake will be less sweet but still rich and fudgy.
Be mindful that sugar-free sweeteners can sometimes affect the crispy top edge, so broil for an extra 1-2 minutes at the end to compensate. The flavor remains deep and chocolate-forward, just with a cleaner sweetness profile.
Lower-Calorie Adjustments
To reduce calories, use light butter (like Land O’Lakes Light Butter) or ½ the butter replaced with ½ cup unsweetened applesauce. Reduce sugar to 1 cup and add ½ cup sugar-free sweetener if needed.
The cake will still be moist and fudgy, just with fewer calories. This version is perfect for those watching their intake without sacrificing indulgence. 💪
Nutrition facts
Frequently asked questions
Why does this flourless chocolate cake need a water bath?
The water bath (bain-marie) creates even heat distribution, preventing cracks while developing that signature crispy top edge. It mimics professional baking techniques, ensuring a moist center and perfect texture throughout. For this recipe, place the cake pan inside a larger roasting pan filled with 1 inch of hot water before baking.
Can I make this cake without a springform pan?
Yes, but use a 9-inch round cake pan with a removable bottom. Grease it thoroughly with butter and cocoa powder, then line the bottom with parchment paper. The cake will still release easily, though the crispy edge might be slightly less pronounced without the springform's flexibility.
How do I fix a sunken middle in my flourless chocolate cake?
A sunken center usually means overbaking or opening the oven too early. For future attempts, bake until a toothpick comes out with moist crumbs (not wet batter) and let it cool completely in the pan for 1 hour before refrigerating. If it happens, try baking at 325°F next time for a slower rise.
What’s the best way to store leftovers?
Keep the cake in an airtight container at room temperature for 3-4 days or refrigerate for up to 2 weeks. For longer storage, wrap tightly in plastic and freeze for up to 3 months. Let it come to room temperature before serving to preserve that perfect contrast between crispy top and fudgy interior.
Can I add coffee or orange zest to this recipe?
For a mocha twist, add 1 tbsp instant espresso powder with the cocoa. For citrus brightness, mix in 1 tsp orange zest when folding in the chocolate chips. Both enhance the chocolate flavor while adding complexity. Start with small amounts to avoid overpowering the rich base.