Desserts
America’s Test Kitchen’s old-fashioned chocolate cake delivers the kind of dense layers and fudgy moisture that turns every slice into a moment of indulgence. ✨ The secret lies in precise measurements, a strategic mix of cocoa and buttermilk, and baking at the exact right temperature—no guesswork, just reliable results.
After years of perfecting this recipe, I’ve replicated their foolproof method for a cake that stays moist for days without drying out.
What sets this cake apart is its rich yet tender crumb, achieved through a combination of all-purpose flour and a touch of cornstarch for structure. The buttermilk adds tangy depth, while melted butter ensures a velvety texture that’s impossible to resist.
Unlike lighter sponge cakes, this version is built for bold flavor—chocolate-forward with a subtle caramel sweetness that lingers with every bite.
Baking at 350°F for the perfect time ensures a golden crust while keeping the interior fudgy and moist—no dry crumb here. The cake’s versatility means you can serve it plain, with a dusting of powdered sugar, or topped with a simple glaze.
Once you try this method, you’ll never settle for anything less than restaurant-quality at home.
Whether you’re baking for a celebration or a quiet afternoon treat, this recipe delivers consistent, professional results every time. Let’s get started—your taste buds will thank you.
Ingredients for america's test kitchen old fashioned chocolate cake
Dense layers and fudgy moisture start with these precise ingredients—no shortcuts.
| Ingredient | Amount | Notes |
|---|---|---|
| Unsalted Butter 🧈 | 1 cup | Melted, cooled slightly |
| Granulated Sugar 🍚 | 2 cups | White sugar preferred |
| Cocoa Powder 🍫 | ¾ cup | Dutch-processed for richness |
| All-Purpose Flour 🌾 | 2 cups | Sifted for even texture |
| Cornstarch 🌾 | 2 tbsp | For tender crumb |
| Baking Powder 🧂 | 1 tsp | Aluminum-free preferred |
| Salt 🧂 | ½ tsp | Diamond Crystal kosher |
| Buttermilk 🥛 | 1 cup | Fresh for tang |
| Vanilla Extract 🌿 | 2 tsp | Pure, high-quality |
| Large Eggs 🥚 | 2 whole | Room temperature |
| Hot Water 💧 | ½ cup | Boiled, not scalding |
| Vegetable Oil 🫒 | ½ cup | For layering |
The cocoa powder is non-negotiable here. Dutch-processed (like Valrhona or Hershey's Special Dark) gives that deep, velvety flavor without bitterness. If you're using natural cocoa, expect a slightly earthier taste. Whole Foods or Penzeys carry excellent options, but the grocery store's name brand works too. The buttermilk? Don't grab the carton from the fridge—let it sit at room temp for 10 minutes first. Cultivate brand is my go-to, but any buttermilk with a tangy kick will do. For the eggs, room temperature is key—they'll blend smoother and help create that signature tender crumb.
No buttermilk? Mix 1 tbsp lemon juice or vinegar with 1 cup milk—it's the same science. Running out of Dutch-processed cocoa? Natural cocoa plus 1/4 tsp baking soda mimics the flavor, though the texture will be slightly drier. The vegetable oil can be swapped for melted butter (same amount), but keep it cool before mixing. Crisco or any neutral oil works in a pinch. And if you're worried about the cornstarch making it too cakey, trust the process—it's what keeps this cake moist for days. The hot water might seem odd, but it's what activates the baking powder for that perfect rise.
This batter keeps covered in the fridge for 2 days—perfect for baking ahead. For longer storage, freeze the batter in an airtight container for up to 3 months. Thaw overnight in the fridge before baking. The finished cake stays moist for 5 days at room temperature, wrapped tightly. Slice and freeze individual portions for up to 3 months—just thaw at room temp before serving. Pro tip: Brush warm slices with melted butter for extra richness.
Why You'll Love This Recipe
- No-Fuss Mixing: I swear by this recipe’s foolproof method—just cream butter and sugar, then fold in dry ingredients. No overmixing, no waiting for eggs to come to room temp, just straightforward layers that come together in one bowl.
- Rich Without Bitterness: That cocoa powder isn’t just any cocoa—it’s the real deal, balanced by the butter and sugar to give you a deep, velvety chocolate flavor. No aftertaste, no chalky texture, just pure, satisfying chocolate that actually tastes like dessert.
- Birthday to Brunch: This cake is my go-to for celebrations and lazy mornings. Cut into squares for a crowd, or serve a single slice with coffee—it’s equally at home on a party table or my kitchen counter.
- Budget-Friendly Luxury: Five simple ingredients, no specialty items, and it still feels like a treat. The cornstarch keeps it moist without needing fancy mix-ins, and the butter makes it taste indulgent—even when I’m stretching my grocery budget.
Step-by-step instructions for america's test kitchen old fashioned chocolate cake
Here's the method that delivers that signature dense, fudgy texture we all love.
👨🍳 Step 1: Melt Butter and Mix Wet Ingredients
In a medium saucepan, melt the 1 cup unsalted butter over low heat until completely liquid. Remove from heat and let cool slightly—it should be warm to the touch but not hot. In a separate large bowl, whisk together the cooled butter with the 2 cups granulated sugar until smooth and fully combined.
Add the 1 cup buttermilk, 2 whole large eggs, and 2 teaspoons vanilla extract to the butter-sugar mixture. Whisk vigorously for 1 minute until the mixture is homogenous and slightly thickened. Here's the thing—this step creates the cake's signature moist texture, so don't rush the whisking. The mixture should be pale and slightly ribbony when you lift the whisk.
👨🍳 Step 2: Sift Dry Ingredients and Combine
In a separate bowl, sift together the 2 cups all-purpose flour, 2 tablespoons cornstarch, 1 teaspoon baking powder, and ½ teaspoon salt. This sifting step prevents lumps and ensures an even texture throughout each slice. Add the ¾ cup cocoa powder to the dry ingredients and whisk to combine thoroughly.
With the mixer on low speed, gradually add the dry ingredients to the wet mixture. Mix just until combined—you should still see some flour streaks. Overmixing develops gluten, which leads to a tough cake. Here's where it gets fun: pour in the ½ cup hot water and mix for another 30 seconds until the batter is smooth and slightly thick. The hot water activates the baking powder, creating that signature tender crumb.
🍳 Step 3: Layer and Bake to Perfect Doneness
Preheat your oven to 350°F. Grease two 9-inch round cake pans with the ½ cup vegetable oil, then line the bottoms with parchment paper. Divide the batter evenly between the pans, smoothing the tops with a spatula. Here's the critical part: tap each pan firmly on the counter 3-4 times to remove any air bubbles that would create domes in your cake.
Bake for 30-35 minutes until a toothpick inserted in the center comes out with a few moist crumbs but no wet batter. The edges should be set, but the center should still have a slight give. I know it seems counterintuitive, but this slight underbake ensures that fudgy moisture we're after. Don't overbake—it's easy to do, and the cake will dry out.
⏰ Step 4: Cool and Layer for Maximum Moisture
Remove the cakes from the oven and let them cool in the pans for 10 minutes. Then transfer to a wire rack to cool completely. Here's the secret to that classic old-fashioned texture: while the cakes are still warm, spread a thin layer of the reserved butter mixture (about 1 tablespoon) between the layers. This butter bridge keeps the cake moist for days.
For the final touch, brush the tops and sides of each layer with a simple glaze made by mixing ½ cup powdered sugar with 1 tablespoon milk. This step adds shine and prevents the cake from drying out. Let the cake cool completely before slicing—patience here ensures clean layers and maximum moisture in every bite.
Pro Tips For Making America'S Test Kitchen Old Fashioned Chocolate Cake
- Whisk Butter and Sugar: DESCRIPTION: Don’t just mix them—whisk that butter and sugar until it’s pale yellow and ribbony. I used to skip this, and the cake turned out dense. The extra air lightens the texture, especially with cocoa’s heaviness.
- Sift the Cocoa: DESCRIPTION: Measure cocoa powder by weight (not volume) and sift it twice—once before mixing, once after. Unsifted cocoa packs unevenly, leading to dry spots. (Yes, even if the bag says “sifted.”)
- Check Doneness Early: DESCRIPTION: Pull the cake when the center reads 205°F and springs back slowly—not instantly. Oven temps vary, and overbaking turns the crumb gummy. A toothpick with moist crumbs (not wet batter) is the real test.
- Grease with Butter, Dust with Flour: DESCRIPTION: Skip the parchment for this recipe—grease the pan thoroughly with melted butter, then coat with flour. The cake’s dense texture sticks to parchment, and a lightly floured pan ensures clean slices. (Use a pastry brush for even coverage.)
Wine and beer pairings for america's test kitchen old fashioned chocolate cake
Rich Red Wine
This dense, fudgy cake pairs beautifully with a bold red wine like a Cabernet Sauvignon or Merlot—their tannins complement the chocolate’s richness without overpowering it. I love a Napa Valley Cabernet with its dark fruit notes and velvety texture, or a Washington State Merlot for smoother, plum-forward balance.
Serve slightly chilled to enhance the wine’s acidity and let the flavors dance together. 🍷
Creamy Dessert Wines
For a sweeter contrast, try a Moscato d’Asti or Late Harvest Riesling—their honeyed sweetness and effervescence cut through the cake’s density. A chilled Glass Mountain Riesling from California offers bright citrus notes that refresh your palate between bites.
These wines work especially well if you’re serving the cake with a chocolate ganache or whipped cream.
Dark Beer Pairings
A stout like Guinness or Dark Ale from New Belgium mirrors the cake’s deep cocoa flavors with its roasted malt and coffee undertones. The creamy head of a stout also mimics the cake’s fudgy texture, making every sip feel like dessert.
For a lighter option, try a Belgian-style Dubbel—its caramel and spice notes enhance the cake’s caramelized sugar. 🍺
Aged Rum or Bourbon
If you prefer spirits, an aged rum like Appleton Estate or a smooth bourbon such as Woodford Reserve elevates the experience. The rum’s vanilla and caramel notes harmonize with the cake’s chocolate, while bourbon’s oak and spice add complexity.
Serve the rum neat or on the rocks, and sip the bourbon straight—both enhance the cake’s depth without competing. 🥃
Coffee or Espresso
For a caffeine kick, pair the cake with a strong brewed coffee or espresso. The bitterness in dark roasts balances the sweetness, while the crema on a latte adds a luxurious touch.
I often drizzle a little hot fudge sauce over the cake and pair it with a cortado—the perfect marriage of chocolate and coffee. ☕
Seasonal Adaptations
In warmer months, a sparkling rosé with its berry notes and crisp acidity refreshes the palate. For winter, a Port wine or Tawny adds warmth and depth, especially when the cake is topped with warm chocolate sauce and toasted nuts.
The wine’s nutty undertones echo the cake’s rich texture. ✨
Nutrition facts
Frequently asked questions
Why does this chocolate cake stay moist for days?
The secret lies in the cornstarch and buttermilk combination, plus the butter bridge between layers. The cornstarch creates a tender crumb while the buttermilk adds moisture and tang. The butter layer between cakes acts like a moisture seal, keeping slices soft for 5 days at room temperature.
Can I make this cake in a single layer instead of two?
Yes, but reduce baking time to 25-30 minutes in a 9x13-inch pan. Use the same batter recipe, but expect a slightly different texture—single layers are denser at the edges. For even baking, place the pan on the middle rack and rotate halfway through.
What's the best way to store leftover cake?
Wrap tightly in plastic wrap or store in an airtight container at room temperature for 5 days. For longer storage, freeze individual slices wrapped in plastic for up to 3 months. Thaw at room temperature before serving. Pro tip: Brush warm slices with melted butter to restore moisture.
Why did my cake turn out dry?
Overbaking is the #1 cause—remove the cake when a toothpick has moist crumbs (not wet batter). Another common mistake is using too much flour or not measuring properly. The hot water activates baking powder, so skip it if you want a lighter texture. Always use the butter bridge between layers to maintain moisture.
Can I substitute Dutch-processed cocoa?
Yes, but add ¼ teaspoon baking soda to natural cocoa for similar flavor. The texture will be slightly drier, so increase buttermilk by 1 tablespoon to compensate. For best results, use Dutch-processed cocoa—it dissolves smoothly and gives that signature velvety taste.