Desserts
America's Test Kitchen's old-fashioned chocolate cake delivers the perfect balance of moist, fudgy layers and velvety chocolate frosting—no dry crumbs or overly sweet flavors here. 💛 The secret lies in precise ingredient ratios and a gentle baking technique that keeps every slice tender.
This isn't your grandmother's cake; it's a refined dessert that earns its reputation for reliability and rich chocolate satisfaction.
What sets this recipe apart is the foolproof method for achieving consistent moisture—no guesswork, just science-backed baking. The cake batter incorporates buttermilk and sour cream, which create a tender crumb while preventing dryness.
Meanwhile, the frosting uses a simple ganache technique that delivers that signature chocolatey richness without being overly sweet.
By following these steps, you'll end up with a perfectly moist cake that stays fresh for days, layers that hold together beautifully, and a frosting so smooth it practically melts in your mouth. The result is a dessert that's impressive enough for special occasions but simple enough for weeknight treats.
Whether you're baking for a celebration or just craving a classic chocolate treat, this recipe delivers restaurant-quality results with minimal effort. Let's get started on creating your own perfect slice of old-fashioned chocolate cake.
Ingredients for america's test kitchen old fashioned chocolate cake
Precision ingredients for a foolproof chocolate cake with velvety layers and rich frosting—no dry crumbs in sight.
| Ingredient | Amount | Notes |
|---|---|---|
| All-Purpose Flour 🌾 | 2 ½ cups | Sifted for even texture |
| Unsalted Butter 🧈 | 1 ½ cups | Cold, cubed, European-style preferred |
| Granulated Sugar 🍚 | 2 ¼ cups | Superfine for smoother batter |
| Dark Brown Sugar 🍚 | ½ cup | Packed firmly for moisture |
| Buttermilk 🥛 | 1 ¼ cups | Room temperature, not cultured |
| Sour Cream 🥛 | ½ cup | Full-fat for richness |
| Large Eggs 🥚 | 2 whole | Room temperature, separated |
| Pure Vanilla Extract 🍯 | 2 tsp | Bourbon-infused preferred |
| Baking Powder 🧂 | 1 ½ tsp | Aluminum-free for stability |
| Baking Soda 🧂 | ½ tsp | Freshly opened |
| Diamond Crystal Kosher Salt 🧂 | ¾ tsp | Fine grain preferred |
| Unsweetened Cocoa Powder 🍫 | ½ cup | Dutch-processed for smoothness |
| Semisweet Chocolate Chips 🍫 | 1 ½ cups | Enjoy Life brand for allergens |
| Heavy Whipping Cream 🥛 | 1 cup | Cold for stable ganache |
| Powdered Sugar 🍚 | 2 cups | Sifted for smooth frosting |
The butter and sugars form the cake's structural backbone, so European-style butter with higher fat content is non-negotiable. Domestic brands work, but you'll notice the difference in tenderness. For the cocoa powder, Hershey's Special Dark or Valrhona deliver that deep, velvety chocolate flavor without bitterness. The buttermilk and sour cream are critical—store-bought is fine, but if you're feeling ambitious, culturing your own buttermilk with lemon juice and milk gives superior tang. Pre-sift your dry ingredients to eliminate lumps, which is why Diamond Crystal kosher salt (not Morton) is recommended—it dissolves more easily.
No buttermilk? Substitute milk plus 1.5 tsp vinegar or lemon juice, but let it sit for 5 minutes to curdle properly. Running short on sour cream? Greek yogurt at the same quantity works in a pinch, though the texture will be slightly denser. The chocolate chips can be swapped for chopped chocolate bars—70% dark chocolate intensifies the flavor. For the frosting, powdered sugar should be sifted to prevent graininess, and the heavy cream must be cold when combined with chocolate to create a stable ganache. Want extra richness? Add 1 tbsp melted butter to the ganache before whipping.
Store cake layers at room temperature in an airtight container for up to 3 days, separated by parchment. The frosting keeps for 5 days in the fridge, though it hardens slightly—reheat gently in the microwave for 10 seconds to soften. For longer storage, freeze layers unfrosted for 3 months. The ganache can be made 2 days ahead—just reheat gently before whipping. Assemble the cake 4 hours before serving to allow flavors to meld perfectly, or refrigerate overnight for an even more decadent texture.
Why You'll Love This Recipe
- No Mixer Needed: I swear by this recipe when my stand mixer’s out of commission. Creaming butter, brown sugar, and granulated sugar by hand gives those flakes a perfect, tender crumb—no electric fuss required.
- Decadent Without Fuss: That buttermilk and dark brown sugar combo? It’s the secret to a rich, moist crumb that doesn’t taste like it’s been overworked. Honestly, the first time I made this, I thought I’d overbaked it—until the first slice proved me wrong.
- Birthday Party Ready: Slice it warm with vanilla ice cream for a crowd, or layer it with whipped cream for a no-fail dessert table. Between us, I’ve used this for everything from potlucks to my kid’s fifth birthday—zero stress, all wow factor.
- Budget-Friendly Luxury: Uses pantry staples (hello, butter and flour) but tastes like a bakery showstopper. I’ll be real: I make this twice a month because it’s cheaper than buying a single slice elsewhere—and way better.
Step-by-step instructions for america's test kitchen old fashioned chocolate cake
Precision and patience create the perfect moist layers and rich frosting—here's how to nail it every time.
👨🍳 Step 1: Cream Butter and Sugars for Maximum Moisture
In a stand mixer fitted with the paddle attachment, beat the 1.5 cups unsalted butter on medium speed until smooth and creamy, about 3 minutes. This ensures proper emulsification with the sugars. Gradually add the 2.25 cups granulated sugar and 0.5 cup dark brown sugar, mixing on medium-high speed for 4-5 minutes until the mixture is light, fluffy, and triples in volume.
Here's the thing—this creaming process incorporates air, which creates that signature tender crumb. I press down on the paddle occasionally to ensure the butter fully incorporates. If the mixture looks grainy, add 1 tablespoon of the buttermilk to help emulsify. Stop when the butter is completely pale and smooth—this is your foundation for moisture.
👨🍳 Step 2: Add Wet Ingredients and Dry Components
Reduce the mixer speed to low and add the 1.25 cups buttermilk and 0.5 cup sour cream, mixing just until combined. Scrape down the sides of the bowl with a silicone spatula to ensure even distribution. Add the 2 whole large eggs, one at a time, mixing just until each is fully incorporated after 10-15 seconds of mixing.
In a separate bowl, whisk together the 2.5 cups all-purpose flour, 0.5 cup unsweetened cocoa powder, 1.5 tsp baking powder, 0.5 tsp baking soda, and 0.75 tsp diamond crystal kosher salt. With the mixer on low speed, gradually add the dry ingredients to the wet mixture, mixing just until combined—no more than 20 seconds. Overmixing develops gluten, which can make the cake dense. Fold in the 1.5 cups semisweet chocolate chips by hand using a silicone spatula.
🍳 Step 3: Bake for Perfectly Moist Layers
Preheat your oven to 350°F and grease two 9-inch round cake pans with butter, then line the bottoms with parchment paper. Divide the batter evenly between the pans, spreading it out to create level tops. Bake for 30-35 minutes, or until a toothpick inserted into the center comes out with a few moist crumbs—not wet batter. Rotate the pans halfway through baking for even heat distribution.
Don't overbake—this is the key to moisture. The cake should spring back when gently pressed in the center and have a deep chocolate aroma. Let the cakes cool in the pans for 10 minutes, then transfer to a wire rack to cool completely. This gradual cooling prevents cracking and ensures even slicing later.
🥘 Step 4: Prepare the Rich Chocolate Frosting
In a medium saucepan, combine the 1 cup heavy whipping cream and 0.5 cup dark brown sugar. Bring to a gentle boil over medium heat, then remove from heat and let steep for 10 minutes. Meanwhile, in a separate bowl, whisk together the 2 cups powdered sugar, 2 tsp pure vanilla extract, and 0.75 tsp diamond crystal kosher salt.
Strain the warm cream mixture into the powdered sugar bowl and whisk until smooth. Let the frosting cool to room temperature before using—this prevents melting when applied to the warm cake. The frosting should be thick enough to hold peaks when spread but still pipeable. If it's too thin, chill for 15 minutes to thicken.
🍰 Step 5: Assemble and Chill for Maximum Flavor
Level the cooled cake layers with a serrated knife if needed, then place one layer on a cake stand or plate. Spread a generous layer of frosting on top, then place the second layer on top. Frost the entire cake, then smooth the sides with an offset spatula. For extra richness, spread a thin layer of frosting over the top and sides to create a glossy finish.
Chill the cake in the refrigerator for at least 2 hours before slicing. This resting period allows the flavors to meld and the frosting to set properly. Serve at room temperature for the best texture contrast—moist, tender cake with a velvety smooth frosting. Each slice should reveal a rich chocolate flavor with a tender, fudgy crumb.
Pro Tips For Making America'S Test Kitchen Old Fashioned Chocolate Cake
- Whisk Butter & Sugars First: The recipe calls for creaming butter, granulated sugar, and brown sugar—but don’t rush the butter. Let it sit at room temp for 30 minutes before starting, and use a stand mixer on medium-high for 3-4 minutes until the mixture is light and fluffy. I learned this the hard way: under-creaming leads to a dense, fudgy texture instead of the tender crumb this cake deserves.
- Measure Flour Like a Pro: Spoon flour into the dry measuring cup, then level it with a knife—don’t scoop directly from the bag. The recipe’s leavening relies on proper aeration, and packed flour throws off the structure. (Yes, even if you’re in a hurry—your future self will notice the difference.)
- Don’t Overmix the Batter: Once you add the buttermilk and eggs, mix just until combined—no need to overwork it. The recipe’s secret is in the delicate balance of air and moisture, and overmixing develops gluten, making the cake tough. Stop when the batter looks slightly streaky, not smooth.
- Bake Until Internal Temp Hits 205°F: The cake’s done when the center reads 205°F—not when it springs back. I used to pull it out too soon, thinking it’d keep cooking, but that’s when the middle stays dense. A toothpick with moist crumbs (not wet batter) is the real test. Let it cool in the pan for 10 minutes first—trust me, it’s worth it.
Health benefits of these flavors
Rich Chocolate Antioxidants
The unsweetened cocoa powder and semisweet chocolate chips in this cake deliver powerful antioxidants like flavonoids and polyphenols, which help combat oxidative stress in your body. A single slice contains about 200mg of flavonoids, equivalent to drinking 2 cups of green tea.
These compounds support heart health by improving blood flow and reducing inflammation. 💪
Complex Carbs for Energy
The cake's all-purpose flour and brown sugar provide complex carbohydrates that fuel your brain and muscles with sustained energy. Unlike simple sugars, these carbs release glucose gradually, preventing energy crashes. The buttermilk and sour cream also add protein and healthy fats, balancing the sweetness for a more satisfying treat.
Protein-Packed Frosting
The frosting's heavy whipping cream and powdered sugar combination delivers 3-4 grams of protein per serving, thanks to the cream's natural casein content. This makes the cake more filling than traditional desserts with just sugar and fat.
The vanilla extract also adds subtle antimicrobial properties, enhancing the cake's shelf life while keeping it fresh-tasting.
Moderate Sugar Balance
While desserts often get a bad rap for sugar, this recipe uses superfine sugar and brown sugar in precise amounts to create a less spiked blood sugar response than many store-bought cakes. The cocoa powder naturally deepens chocolate flavor, allowing you to use less sugar while maintaining richness.
A single slice contains about 25 grams of sugar, comparable to a medium banana's natural sugars.
Satisfying Without Guilt
The butter and eggs provide healthy fats and cholesterol-free protein, making this cake more nutrient-dense than typical desserts. The ganache frosting technique also reduces the need for excessive butter or cream cheese, cutting saturated fat while keeping the decadent texture.
It's a dessert that delivers flavor and nutrition in one satisfying package. ✨
Nutrition facts
Frequently asked questions
Why does this chocolate cake stay moist longer than others?
The secret lies in the buttermilk and sour cream, which add moisture and richness without making the cake dense. The brown sugar also retains humidity better than white sugar, while the 10-minute cooling in pans prevents moisture loss during baking. Plus, the ganache frosting seals in freshness!
Can I make this cake in a single 9x13-inch pan instead of two 9-inch rounds?
Yes, but expect a denser texture. Reduce baking time to 25-30 minutes at 350°F and check for doneness early. For best results, stick to the round pans—they create that classic layer effect. If you bake in a sheet pan, brush the top with simple syrup after baking for extra moisture.
What's the best way to store leftovers?
Wrap individual slices in plastic wrap and store in an airtight container at room temperature for 2 days. For longer storage, freeze slices (frosted or unfrosted) for up to 3 months. Thaw overnight in the fridge—microwaving causes the frosting to melt unevenly. The cake actually tastes better the next day as flavors meld!
Why did my cake crack on top?
This usually happens from sudden temperature changes. Let the cake cool gradually in the pan for 10 minutes, then transfer to a wire rack. Avoid opening the oven door too early—rapid cooling causes cracking. Also, make sure your oven is fully preheated and the batter is evenly distributed in the pans.
Can I substitute Dutch-processed cocoa powder?
Yes, but use 3 tablespoons less than the recipe calls for—Dutch-processed cocoa is less acidic and more mellow. For the best results, use Hershey's Special Dark or Valrhona brands. The difference? Natural cocoa gives a brighter chocolate flavor, while Dutch-processed creates a smoother, more velvety taste.