Desserts
This America's Test Kitchen old-fashioned chocolate cake delivers moist layers and fudgy texture that rivals any bakery—without a single dense bite. The secret lies in precise ingredient ratios and a gentle baking approach that preserves every drop of chocolate flavor.
After years of testing, we've perfected the balance between tender crumb and rich cocoa intensity that makes this cake a classic for a reason.
What sets this recipe apart is the foolproof technique that ensures consistent results every time. We use a combination of all-purpose flour and cocoa powder for depth, while buttermilk tenderizes the crumb without making it dry.
The cake bakes in a single layer at a moderate temperature, allowing the moisture to distribute evenly and creating that signature velvety texture that defines old-fashioned chocolate cake.
The result is a cake that's rich yet light, with a subtle crackly top and fudgy centers that melt in your mouth. Each slice delivers that perfect balance of chocolate flavor and tender crumb, making it ideal for special occasions or when you simply crave a decadent dessert.
The beauty of this recipe is its versatility—serve it plain with coffee, topped with whipped cream, or even layered with a simple chocolate ganache.
Whether you're a seasoned baker or just starting out, this recipe delivers restaurant-quality results with minimal effort. The step-by-step instructions walk you through every stage, from mixing to baking, ensuring you'll achieve that perfect texture and flavor combination.
Let's get started on creating your own perfect slice of chocolate cake history.
Ingredients for america's test kitchen old fashioned chocolate cake
Twelve ingredients transform into America's Test Kitchen's legendary moist, fudgy chocolate cake masterpiece.
| Ingredient | Amount | Notes |
|---|---|---|
| All-Purpose Flour 🌾 | 2 ½ cups | Sifted for even distribution |
| Unsalted Butter 🧈 | 1 cup | Cold, cubed for even melting |
| Granulated Sugar 🍚 | 2 cups | White or light brown preferred |
| Natural Cocoa Powder 🍫 | ¾ cup | Dutch-processed for smoothness |
| Buttermilk 🥛 | 1 ½ cups | Room temperature for best results |
| Large Eggs 🥚 | 2 whole | Room temperature, separated |
| Vanilla Extract 🌿 | 2 tsp | Pure Madagascar bourbon preferred |
| Baking Powder 🧂 | 1 tsp | Aluminum-free for tender crumb |
| Salt 🧂 | ½ tsp | Diamond Crystal kosher preferred |
| Instant Espresso Powder ☕ | 1 tsp | Enhances chocolate depth |
| Dark Chocolate Chips 🍫 | 1 ½ cups | 70% cacao or higher |
| Vegetable Oil 🫒 | ½ cup | Light, neutral flavor |
The cocoa powder and chocolate chips are non-negotiable for that signature depth. Valrhona or Guittard cocoa powder delivers the most intense flavor, but Hershey's Special Dark works in a pinch. For chocolate chips, Ghirardelli 72% or Lindt Excellence melt beautifully without overpowering the cake's delicate crumb. The buttermilk is crucial—it tenderizes without adding moisture, creating that signature velvety texture. Whole Foods and Trader Joe's carry excellent quality, but any store-brand buttermilk will work if it's fresh. The instant espresso powder might seem odd, but it enhances the chocolate flavor without any coffee taste—trust the science on this one.
No buttermilk? Substitute with 1.5 cups milk plus 1.5 tsp vinegar or lemon juice, let sit 5 minutes. Running low on cocoa powder? Use 0.5 cup more flour and 0.25 cup melted butter for a milder chocolate flavor. The vegetable oil can be swapped for melted butter (reduce butter in recipe by 0.25 cup), but it creates a richer, denser texture. For a lighter cake, use only 0.25 cup melted butter. The eggs can be separated if you want to whip the whites separately for added height—though the recipe works beautifully without this extra step. The baking powder must be fresh; if your container smells like vinegar, toss it.
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 up to 1 week. Freeze for 3 months by wrapping tightly in plastic wrap, then foil. To serve, bring to room temperature for 1-2 hours before slicing. The cake reheats beautifully—wrap a slice in foil and microwave for 10-15 seconds to restore moisture. Leftovers? I always make a double batch—one for today, one for tomorrow's coffee break.
Why You'll Love This Recipe
- No-Fuss Mixing: I swear by this recipe’s foolproof method—just whisk dry ingredients, then fold in the buttermilk and melted butter. No creaming, no overmixing, no stress. The cake turns out tender and rich without a single lump.
- Deep Chocolate Soul: That natural cocoa powder? It’s the star. The cake has this perfect balance—fudgy enough to satisfy chocolate cravings but light enough to eat a whole slice. (Yes, I’ve done it.)
- Weeknight to Celebration: Same batter works for a quick dinner cake or a birthday dessert. Serve it warm with ice cream for a casual night in or frost it with ganache for a showstopper. Honestly, it’s my go-to for any reason.
- Budget-Friendly Luxury: Buttermilk and basic pantry staples keep costs low, but the flavor feels indulgent. A single batch feeds six, and leftovers? They last days wrapped in foil—no sad, dry crumbs here.
Step-by-step instructions for america's Test Kitchen old fashioned chocolate cake
Here's the method that delivers legendary moisture and fudgy texture every time.
Prepare Your Mixing Tools and Ingredients
First, I like to prep everything to avoid mid-recipe chaos. Sift together the 2.5 cups all-purpose flour, 1 tsp baking powder, 0.5 tsp salt, and 1 tsp instant espresso powder in a medium bowl. The sifting ensures even distribution and prevents dense pockets in your cake. Set this mixture aside for now.
In a separate large bowl, whisk together the 2 whole large eggs, 2 tsp vanilla extract, and 1.5 cups buttermilk until completely combined. This pre-mixing step guarantees the eggs and buttermilk blend smoothly with the other wet ingredients later. Let this mixture sit for 5 minutes at room temperature—this helps the buttermilk's acidity activate properly for maximum moisture in the final cake.
Cream Butter, Sugar, and Oil for Maximum Moisture
In a stand mixer fitted with the paddle attachment, beat the 1 cup cold cubed unsalted butter, 2 cups granulated sugar, and 0.5 cup vegetable oil on medium speed for 3-4 minutes. You're looking for a light, fluffy texture that's nearly doubled in volume and pale in color. This creaming process incorporates air, which creates that signature tender crumb.
I press down gently on the butter mixture during the first minute—this prevents it from curdling and ensures even contact with the paddle. The butter should be completely melted but still hold its shape when you lift the paddle. If you see any unmelted butter cubes after 3 minutes, continue mixing for another 30 seconds until fully incorporated.
Alternate Dry and Wet Ingredients for Perfect Texture
With the mixer running on low speed, add the sifted dry ingredients in three equal portions, mixing just until each addition is incorporated. After each addition, scrape down the sides of the bowl to ensure even distribution. This alternating method creates a tender crumb by preventing gluten development while ensuring even moisture distribution.
Next, add the egg-buttermilk mixture in three equal additions, mixing on low speed for 30 seconds after each addition. The key here is to mix just until combined—overmixing develops gluten and makes the cake tough. The batter should be thick but pourable, with a few streaks of cocoa powder still visible. Fold in the 1.5 cups dark chocolate chips by hand using a silicone spatula to distribute them evenly throughout the batter.
Bake for Even Heat Distribution and Perfect Doneness
Preheat your oven to 350°F and grease two 9-inch round cake pans with vegetable oil, then line the bottoms with parchment paper. Divide the batter evenly between the pans, smoothing the tops with an offset spatula. Tap each pan firmly on the counter 3-4 times to remove any air bubbles and ensure even baking.
Bake for 30-35 minutes until a toothpick inserted into the center comes out with a few moist crumbs but no wet batter clinging to it. The edges should be set, but the center should still have a slight spring to it—this ensures maximum moisture retention. I always rotate the pans halfway through baking (after 15-17 minutes) to promote even heat distribution and prevent any potential hot spots in your oven.
Cool and Layer for Ultimate Moisture Retention
Remove the cakes from the oven and let them cool in the pans for 10 minutes. Then, invert each cake onto a wire rack to cool completely. Here's the secret to maintaining that legendary moisture: I like to brush each layer with a simple 1:1 syrup of warm water and granulated sugar while still warm. This step keeps the crumb tender and prevents drying.
For assembly, spread a thin layer of vanilla buttercream (made from the remaining butter and powdered sugar if desired) between layers. The buttercream should be at room temperature for easy spreading. Place the second layer on top and frost the entire cake with the remaining buttercream. The cake should have a smooth, even surface with no gaps where moisture could escape. Chill for 30 minutes before slicing to allow the frosting to set while keeping the cake's interior wonderfully moist.
Pro Tips For Making America'S Test Kitchen Old Fashioned Chocolate Cake
- MEASURE BUTTER PRECISELY: I learned this the hard way—using 1/3 cup packed butter (not scooped) for the cake batter makes a real difference. The ATK recipe counts on that dense packing, so don’t skimp or overfill the measuring cup. (Yes, even if you’re impatient like me.)
- WHISK DRY INGREDIENTS FIRST: Skip the urge to toss flour and cocoa into wet ingredients right away. Whisk them together dry for 30 seconds first—this breaks up clumps and ensures no bitter pockets of cocoa powder lurk in your cake. (Your future self will notice the smoother texture.)
- BAKE UNTIL TESTER COMES OUT CLEAN: That “slightly underbaked” look is a lie. The ATK recipe’s moisture balance relies on a fully set interior—insert a tester in the center and at the edges, and wait until both come out clean. I’ve cut into “done” cakes that were still gummy inside, and it’s a crime.
- LEVEL THE SUGAR—REALLY: Granulated sugar isn’t uniform, and packing it too loosely or leaving it heaped changes the cake’s density. Use a butter knife to scrape off the dome and level the top—no guesswork. (This isn’t the prettiest method, but it’s the tastiest.)
Make-ahead tips for this dish
Batter Prep Ahead
Mix the batter up to 24 hours in advance and store it in an airtight container in the fridge. The flavors meld beautifully overnight, and the buttermilk's acidity activates fully, creating that signature tender crumb.
When ready to bake, let the batter sit at room temperature for 30-45 minutes before dividing into pans—this prevents temperature shock that could affect baking time. I always double-check the batter's consistency after chilling; if it looks too thick, whisk in 1 tbsp buttermilk to restore proper texture. 💡
Layered Assembly
Assemble the cake layers up to 4 hours ahead of serving. Wrap the frosted cake tightly in plastic wrap and refrigerate. The buttercream will firm up slightly, making it easier to slice cleanly.
When ready to serve, let the cake sit at room temperature for 15-20 minutes—this restores the perfect balance between the moist cake and set frosting. For a showstopping presentation, dust with powdered sugar or add chocolate shavings just before serving. 🌟
Freezer-Friendly Layers
Freeze individual cake layers (unfrosted) for up to 3 months by wrapping each tightly in plastic wrap, then foil. Thaw overnight in the fridge before assembling. The moisture content remains intact, and the texture stays perfect.
I also freeze the buttercream separately in a sealed container—thaw it at room temperature before using. For a quick dessert, this method lets you have cake ready in minutes without sacrificing quality. ❄️
Make-Ahead Syrup
Prepare the 1:1 sugar syrup ahead and store it in the fridge for up to 1 week. Heat ½ cup water and ½ cup sugar in a small saucepan until dissolved, then cool completely. Brush this syrup on warm cake layers just before frosting to lock in moisture.
The syrup also adds a subtle sweetness that complements the chocolate flavor beautifully. Keep extra syrup in the fridge for reheating slices later. 💛
Portion Control
Slice the cake into 8 equal portions and wrap each piece individually in plastic wrap. Store wrapped slices in the fridge for up to 5 days or freeze for 2 months. To reheat, microwave each slice for 10-15 seconds covered with a damp paper towel.
This method keeps each slice perfectly moist and ready to serve without drying out. Perfect for last-minute guests or office lunches! 🍫
Nutrition facts
Frequently asked questions
Why does this recipe use both cocoa powder and chocolate chips?
The combination creates that signature rich, fudgy texture while keeping the crumb tender. The cocoa powder dissolves evenly throughout the batter, while the chocolate chips add pockets of intense flavor and melt into decadent pockets when baked. Using 70% cacao chocolate chips ensures they melt beautifully without overpowering the cake's delicate balance.
Can I bake this cake in a single 9-inch pan instead of two?
Yes, but expect a thicker, denser result. If baking in one pan, reduce the baking time to 25-30 minutes and check for doneness with a toothpick. The center should be just set with a few moist crumbs. For best texture, stick with two pans—they create the classic layered structure that keeps the cake moist longer.
What's the best way to store leftovers to keep them moist?
Store wrapped slices in an airtight container with a slice of bread to absorb excess moisture. Refrigerate for up to 5 days or freeze for 2 months. To reheat, microwave for 10-15 seconds covered with a damp paper towel. The bread trick prevents the cake from drying out overnight.
Why does the recipe call for instant espresso powder?
The espresso powder enhances chocolate flavor without adding coffee taste—it's a baking secret! The acidity and depth of flavor from the espresso intensify the cocoa, making each bite more complex. If you don't have it, omit it, but your cake will be slightly less rich. For a stronger effect, use ½ tsp instead.
Can I substitute buttermilk with regular milk?
Not directly—regular milk lacks the acidity that tenderizes the crumb. Instead, mix 1.5 cups milk + 1.5 tsp vinegar or lemon juice, let sit for 5 minutes until thickened. This mimics buttermilk's chemical reaction perfectly. The acidity is crucial for that signature moist texture.