Easiest Chocolate Cake Recipe

Some chocolate cakes are fussy—this one isn’t. You whisk the dry ingredients, mix in the wet, then pour in boiling water and watch the batter turn glossy and loose (don’t panic: that thin batter is exactly what makes the baked cake so tender). If you like the deep, straightforward cocoa flavor you get from classic sheet cakes, you’re in the right place.

This is the kind of 9×13 cake I make when I want a guaranteed crowd-pleaser with minimal dishes. It bakes up soft and plush, slices clean once cooled, and it’s especially good under a simple chocolate ganache. If you’re craving something a little more “party-style” later, my chocolate caramel toffee crunch cake is a fun next bake—but this one is the easiest place to start.

Why You’ll Love This Recipe

• It’s a true one-bowl style cake: dry ingredients first, then eggs, milk, oil, and vanilla—no creaming, no mixer required.
• The boiling water blooms the cocoa powder, giving the cake a darker color and a more pronounced chocolate aroma as it bakes.
• The batter is intentionally thin, which helps the cake bake up moist with a soft, springy crumb (not dense or brownie-like).
• It’s made for a 9×13 pan, so there’s no stacking, leveling, or fragile layers—just easy slicing and serving.
• The cocoa-forward cake balances beautifully with a chocolate ganache topping for a glossy, bakery-style finish.

The Story Behind This Recipe

I put this cake on repeat anytime I need something dependable: a single pan, pantry-staple dry ingredients, and a batter that comes together faster than the oven preheats—then I finish it with ganache once it’s fully cooled for that clean, shiny top.

What It Tastes Like

It’s pleasantly sweet but clearly chocolate-forward, with a warm vanilla note underneath. While it bakes, you’ll smell cocoa like hot chocolate mix in the oven. The crumb is soft and tender (thanks to the oil and the thin, water-loosened batter), and the ganache adds a richer, truffle-like finish on top without making the cake feel heavy.

Ingredients You’ll Need

This recipe leans on unsweetened cocoa powder for the main flavor, and uses both baking powder and baking soda to lift the cake and keep the crumb light. Whole milk adds richness and helps everything blend smoothly, while vegetable oil keeps the cake moist even after it cools. The boiling water is the key move: it deepens the cocoa flavor and makes the batter look very loose—that’s correct.

• 1 and 3/4 cups all-purpose flour
• 1 and 1/2 cups granulated sugar
• 3/4 cup unsweetened cocoa powder
• 1 and 1/2 teaspoons baking powder
• 1 and 1/2 teaspoons baking soda
• 1 teaspoon salt
• 2 large eggs
• 1 cup whole milk
• 1/2 cup vegetable oil
• 2 teaspoons vanilla extract
• 1 cup boiling water
• Chocolate ganache for topping

How to Make Easiest Chocolate Cake

1. Heat the oven and prep the pan.
   Preheat to 350°F (175°C). Grease and flour a 9×13-inch cake pan, making sure you get into the corners so the cake releases cleanly.

2. Whisk the dry ingredients well.
   In a large mixing bowl, whisk together the flour, sugar, cocoa powder, baking powder, baking soda, and salt until the cocoa is evenly dispersed and you don’t see streaks of brown vs. white. This helps the cake bake evenly without bitter cocoa pockets.

3. Add the wet ingredients (except the boiling water).
   Add the eggs, milk, vegetable oil, and vanilla to the bowl. Mix until the batter looks smooth and uniform. Stop once it’s combined—over-mixing can make the crumb tougher than it needs to be.

4. Stir in the boiling water carefully.
   Slowly pour in the boiling water while stirring. The batter will thin out dramatically and look almost pourable like a loose brownie batter. That’s the intended texture.

5. Pour and bake.
   Pour the batter into the prepared 9×13 pan. Bake for 30–35 minutes, until the top looks set and a toothpick inserted in the center comes out clean.

6. Cool properly before topping.
   Let the cake cool in the pan for about 10 minutes, then transfer to a wire rack to cool completely. (If you top with ganache while the cake is warm, it can melt too thinly and soak in.)

7. Finish with ganache.
   Once fully cool, top with chocolate ganache before serving, spreading it to the edges for a neat, glossy finish. If you love the ganache-and-cake combo, my bonfire chocolate Nutella cupcakes scratch a similar itch in a handheld form.

Tips for Best Results

• Make sure your cocoa is fully mixed into the dry ingredients. If you see little dark clumps after adding the wet ingredients, they’ll bake into pockets that taste sharper than the rest of the cake.
• Pour the boiling water in gradually. A slow stream gives you a smoother batter and keeps the eggs from getting shocked by heat in one spot.
• Start checking at 30 minutes. This cake can go from perfectly moist to a touch dry if it overbakes—pull it as soon as the toothpick comes out clean.
• Cool all the way before ganache. The cake should feel room-temp to the touch; otherwise the ganache can slide and turn dull instead of setting up nicely.
• For cleaner slices, wait until the ganache settles. Even a short rest after topping helps the knife glide through the top without dragging.

Variations and Substitutions

• Different pan, same vibe: The recipe is written for a 9×13, and that’s my favorite for the softest, most even bake. If you’re looking for other chocolate cake formats, try my buttermilk chocolate cake for a slightly tangier chocolate profile.
• Change the finish: The ganache is the intended topping here, but you can apply it as a thin glaze or a thicker layer depending on how you spread it once the cake is cool.

How to Serve It

Serve this cake at room temperature for the fullest cocoa flavor and the softest crumb. I like slicing it into squares straight from the 9×13 pan and letting the ganache be the “fancy” part—no extra decoration needed. For a more dessert-table-style chocolate option with a fruity twist, this chocolate cake with cherry pie filling is another great one to keep in your back pocket.

How to Store It

Once the ganache is on, cover the cake and store it in the refrigerator to keep the topping firm and neat. For the best texture, let slices sit out for a few minutes before eating so the cake loses its chill and tastes more chocolatey. If you’re making it ahead, bake and cool the cake completely first, then add the ganache closer to serving for the cleanest finish. If you’re into ultra-low-effort chocolate desserts, my chocolate caramel dump cake is another easy win.

Final Thoughts

This is my go-to “no excuses” chocolate cake: one pan, a quick stir-together batter, and that signature thin pour of boiling water that makes the crumb come out soft and moist every time. If you’ve been wanting a reliable chocolate sheet cake that looks polished with ganache but doesn’t ask much from you, this one earns a spot in your regular rotation.

Conclusion

If you want to compare this style of easy, cocoa-rich cake to other well-tested versions, I’d suggest looking at One Bowl Chocolate Cake Recipe – Allrecipes, the single-pan approach in Easiest chocolate cake recipe ever, and it’s made in a single pan, and the extra troubleshooting notes in Easy Chocolate Cake: Moist, Decadent, Foolproof – Bake With Zoha.