A classic yellow sheet cake with rich chocolate frosting never goes out of style. It’s the kind of dessert that shows up for birthdays, potlucks, and weeknight cravings—reliable, nostalgic, and always a hit. This version keeps it simple: a soft, tender crumb with a creamy, fudgy frosting you can spread in minutes.
You don’t need special pans or fancy techniques, just basic pantry ingredients and a mixing bowl. If you love an easy, homemade cake that tastes like it came from a bakery, this one’s for you.
What Makes This Recipe So Good
- Moist and tender texture: Butter, oil, and buttermilk work together to create a soft crumb that stays moist for days.
- Reliable and forgiving: This batter is sturdy and bakes evenly in a standard 9×13 pan—no layers, no fuss.
- Deep chocolate frosting: Cocoa powder and melted butter make a smooth, rich frosting that sets just enough without getting stiff.
- Simple ingredients: Everything is easy to find and likely already in your kitchen.
- Perfect for a crowd: One pan, clean slices, and plenty to go around.
Shopping List
- All-purpose flour
- Granulated sugar
- Baking powder
- Baking soda
- Kosher salt
- Unsalted butter (softened for cake; melted for frosting)
- Neutral oil (like canola or vegetable)
- Large eggs
- Egg yolks (for extra richness)
- Buttermilk (or milk + vinegar/lemon juice)
- Vanilla extract
- Cocoa powder (natural or Dutch-process for frosting)
- Powdered sugar
- Whole milk or heavy cream (for frosting)
- Pinch of salt (for frosting balance)
- Optional toppings: sprinkles, chocolate shavings, flaky sea salt
How to Make It
- Prep the pan and oven: Heat oven to 350°F (175°C). Grease a 9×13-inch metal baking pan and line the bottom with parchment for easy lifting.
Lightly flour the pan if you want extra insurance.
- Whisk dry ingredients: In a large bowl, whisk 2 1/2 cups all-purpose flour, 1 3/4 cups granulated sugar, 2 teaspoons baking powder, 1/2 teaspoon baking soda, and 1 teaspoon kosher salt until well combined.
- Cream and combine fats: In another bowl, beat 1/2 cup softened unsalted butter with 1/4 cup neutral oil until smooth. You can use a hand mixer or stand mixer on medium speed for 1–2 minutes.
- Add eggs and vanilla: Beat in 3 large eggs plus 2 yolks, one at a time, then add 2 teaspoons vanilla extract. Mix until glossy and well blended.
- Alternate dry and buttermilk: Add the dry ingredients in three additions, alternating with 1 cup buttermilk, starting and ending with dry.
Mix on low until just combined. Do not overmix. The batter should be thick but pourable.
- Bake: Spread batter evenly in the pan.
Tap the pan on the counter to pop large air bubbles. Bake 25–32 minutes, until the top is set, edges are lightly golden, and a toothpick comes out with a few moist crumbs.
- Cool completely: Set the pan on a rack. Cool the cake in the pan until room temperature before frosting.
Warm cake will melt the frosting.
- Make the frosting: In a bowl, whisk 1/2 cup unsalted butter, melted and slightly cooled, with 1/2 cup unsweetened cocoa powder until glossy. Add 3 cups powdered sugar, a pinch of salt, 1/3 cup milk or cream, and 1 teaspoon vanilla. Beat until smooth and fluffy, 2–3 minutes.
Adjust consistency with more milk or powdered sugar as needed.
- Frost and finish: Spread frosting over the cooled cake with an offset spatula. Add sprinkles or chocolate shavings if you like. Let it set 10–15 minutes before slicing.
Storage Instructions
- Room temperature: Keep the frosted cake covered at room temp for up to 2 days.
A cake lid or foil works well.
- Refrigerator: For longer storage, cover tightly and refrigerate up to 5 days. Bring slices to room temp before serving for the best texture.
- Freezer: Freeze unfrosted cake, well wrapped, for up to 2 months. Thaw, then frost.
You can also freeze individual frosted slices; freeze solid, wrap well, and thaw overnight in the fridge.
Benefits of This Recipe
- Consistently moist: The mix of butter and oil keeps the crumb soft without feeling greasy.
- Beginner-friendly: Straightforward steps, common tools, and a single pan make success likely even if you don’t bake often.
- Flexible frosting: The chocolate frosting is silky but sturdy, so it spreads easily and holds its shape.
- Scalable: Double the recipe for a crowd using two pans, or halve it in an 8×8 pan with a shorter bake time.
- Great make-ahead: The cake tastes even better the next day as the flavors settle.
Common Mistakes to Avoid
- Overmixing the batter: This leads to a tough, dense cake. Mix just until the flour disappears.
- Cold ingredients: Use room-temperature butter, eggs, and buttermilk so the batter emulsifies smoothly.
- Overbaking: Start checking at 25 minutes. Pull it when a toothpick shows a few moist crumbs, not a dry stick.
- Frosting a warm cake: The frosting will melt and slide.
Wait until the cake is fully cool.
- Too-thick frosting: If it’s hard to spread, beat in a tablespoon of milk at a time until creamy.
Recipe Variations
- Confetti cake: Fold 1/2 cup rainbow sprinkles into the batter right before baking.
- Peanut butter frosting: Swap 1/4 cup of the butter in the frosting for creamy peanut butter and add a pinch more salt.
- Mocha frosting: Stir 1–2 teaspoons instant espresso powder into the milk before adding to the frosting.
- Chocolate chip yellow cake: Toss 3/4 cup mini chocolate chips with 1 tablespoon flour and fold into the batter.
- Lemon-vanilla twist: Add 1 tablespoon lemon zest to the batter and 1 teaspoon to the frosting for a bright, bakery-style vibe.
- Sheet cake cupcakes: Scoop into lined muffin tins and bake 16–20 minutes for easy-to-serve portions.
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FAQ
Can I make this without buttermilk?
Yes. Make a quick substitute by mixing 1 cup milk with 1 tablespoon white vinegar or lemon juice. Let it sit for 5 minutes, then use as directed.
What’s the best cocoa powder for the frosting?
Both natural and Dutch-process work.
Dutch-process gives a smoother, deeper chocolate flavor and darker color, while natural cocoa tastes a bit brighter. Use what you have.
Can I use a glass pan?
You can, but glass bakes slower and can cause over-browning at the edges. If using glass, reduce the oven temperature by 25°F and start checking doneness a few minutes later.
How do I know when the cake is done?
Look for light golden edges, a springy top, and a toothpick that comes out with a few moist crumbs.
If it’s wet or gooey, give it a few more minutes.
Can I make the cake ahead?
Absolutely. Bake the cake a day ahead, cool, wrap tightly, and store at room temperature. Frost the day you plan to serve.
How do I get clean slices?
Use a long, sharp knife.
Wipe the blade with a warm, damp towel between cuts. Letting the frosting set for 15–20 minutes also helps.
Is this cake good for birthdays?
Yes. It slices neatly, holds candles well, and pairs beautifully with sprinkles.
The flavor is classic and crowd-pleasing.
Can I reduce the sugar?
You can reduce the cake sugar by about 1/4 cup without hurting the texture. For the frosting, balance sweetness by adding a pinch more salt and a little extra cocoa if desired.
How do I make the cake fluffier?
Make sure your baking powder and baking soda are fresh, don’t overmix, and use room-temperature ingredients. A brief 5-minute rest before baking can also help the batter relax.
Wrapping Up
This Yellow Sheet Cake with Chocolate Frosting is simple to make, easy to serve, and always a favorite.
With its moist crumb and rich, creamy topping, it delivers that timeless bakery taste without extra fuss. Keep the ingredients on hand and you’ll have a go-to dessert for birthdays, cookouts, or any night that calls for something sweet. Once you try it, you’ll want to bake it again and again.
Yellow Sheet Cake with Chocolate Frosting Easy Moist Cake Recipe – Simple, Crowd-Pleasing Dessert
Ingredients
- All-purpose flour
- Granulated sugar
- Baking powder
- Baking soda
- Kosher salt
- Unsalted butter (softened for cake; melted for frosting)
- Neutral oil (like canola or vegetable)
- Large eggs
- Egg yolks (for extra richness)
- Buttermilk (or milk + vinegar/lemon juice)
- Vanilla extract
- Cocoa powder (natural or Dutch-process for frosting)
- Powdered sugar
- Whole milk or heavy cream (for frosting)
- Pinch of salt (for frosting balance)
- Optional toppings: sprinkles, chocolate shavings, flaky sea salt
Instructions
- Prep the pan and oven: Heat oven to 350°F (175°C). Grease a 9×13-inch metal baking pan and line the bottom with parchment for easy lifting.Lightly flour the pan if you want extra insurance.
- Whisk dry ingredients: In a large bowl, whisk 2 1/2 cups all-purpose flour, 1 3/4 cups granulated sugar, 2 teaspoons baking powder, 1/2 teaspoon baking soda, and 1 teaspoon kosher salt until well combined.
- Cream and combine fats: In another bowl, beat 1/2 cup softened unsalted butter with 1/4 cup neutral oil until smooth. You can use a hand mixer or stand mixer on medium speed for 1–2 minutes.
- Add eggs and vanilla: Beat in 3 large eggs plus 2 yolks, one at a time, then add 2 teaspoons vanilla extract. Mix until glossy and well blended.
- Alternate dry and buttermilk: Add the dry ingredients in three additions, alternating with 1 cup buttermilk, starting and ending with dry.Mix on low until just combined. Do not overmix. The batter should be thick but pourable.
- Bake: Spread batter evenly in the pan.Tap the pan on the counter to pop large air bubbles. Bake 25–32 minutes, until the top is set, edges are lightly golden, and a toothpick comes out with a few moist crumbs.
- Cool completely: Set the pan on a rack. Cool the cake in the pan until room temperature before frosting.Warm cake will melt the frosting.
- Make the frosting: In a bowl, whisk 1/2 cup unsalted butter, melted and slightly cooled, with 1/2 cup unsweetened cocoa powder until glossy. Add 3 cups powdered sugar, a pinch of salt, 1/3 cup milk or cream, and 1 teaspoon vanilla. Beat until smooth and fluffy, 2–3 minutes.Adjust consistency with more milk or powdered sugar as needed.
- Frost and finish: Spread frosting over the cooled cake with an offset spatula. Add sprinkles or chocolate shavings if you like. Let it set 10–15 minutes before slicing.