The Best Chocolate Sheet Cake Recipe
The BEST Chocolate Sheet Cake Recipe is a easy American recipe that serves 12. 800 calories per serving. Recipe by Preppy Kitchen on YouTube.
Prep: 45 min | Cook: 45 min | Total: 1 hr 50 min
Cost: $71.08 total, $5.92 per serving
Ingredients
- 3 cups All-Purpose Flour (sifted)
- 0.5 cup Dutch-Processed Cocoa Powder (sifted to avoid lumps)
- 2 teaspoons Baking Soda (ensure fresh for best rise)
- 1.5 teaspoons Baking Powder (double‑acting)
- 0.75 teaspoon Kosher Sea Salt (standardized grain size)
- 2.667 cups Granulated Sugar (adds sweetness and softness)
- 0.75 cup Toasted Pecans or Walnuts (optional mix‑in for crunch)
- 1 cup Buttermilk (whole‑milk preferred for richness)
- 0.5 cup Sour Cream (full‑fat for tenderness)
- 0.75 cup Vegetable Oil (neutral flavor, keeps cake moist)
- 3 large Eggs (cracked separately to avoid shells)
- 1 tablespoon Vanilla Extract (pure vanilla for depth)
- 1.5 cups Hot Coffee (or Boiling Water) (near boiling; coffee enhances chocolate flavor)
- 1.5 cups Unsalted Butter (room temperature, softened)
- 1 lb Powdered Sugar (sifted to avoid lumps)
- 0.25 cup Dutch-Processed Cocoa Powder (Frosting) (sifted for smooth frosting)
- 0.75 teaspoon Kosher Sea Salt (Frosting) (same as dry mix)
- 0.33 cup Hot Fudge (or Chocolate Ganache) (adds richness to frosting)
- 3 tablespoons Heavy Cream or Milk (add a tablespoon at a time to adjust frosting consistency)
Instructions
Preheat Oven
Set the oven to 350°F and let it fully preheat.
Time: PT5M
Temperature: 350°F
Sift Dry Ingredients
In a large bowl, sift together the flour, cocoa powder, baking soda, baking powder, and salt. Press out any clumps with a spatula.
Time: PT5M
Whisk Dry Mix
Give the sifted dry ingredients a quick whisk to ensure even distribution.
Time: PT2M
Measure Wet Ingredients
Measure the buttermilk, sour cream, vegetable oil, eggs, and vanilla extract. Crack eggs into a separate bowl before adding.
Time: PT5M
Prepare Hot Coffee
Brew 1½ cups of strong coffee (or boil water) and keep it hot.
Time: PT5M
Line Baking Pan
Line a 9×13‑inch pan with parchment paper, folding it into a sling, then spray lightly with non‑stick spray.
Time: PT3M
Combine Wet and Dry
Pour the wet mixture into the dry bowl and stir until just combined. Scrape the sides to eliminate dry pockets.
Time: PT3M
Transfer to Pan
Pour the batter into the prepared pan and smooth the top with a spatula.
Time: PT2M
Bake Cake
Bake at 350°F for 45‑50 minutes, or until the center springs back when gently pressed.
Time: PT45M
Temperature: 350°F
Cool Cake
Allow the cake to cool in the pan on a rack for about 30 minutes before frosting.
Time: PT30M
Cream Butter
In a stand mixer, beat the softened butter on medium speed for 2 minutes until smooth.
Time: PT2M
Add Powdered Sugar
Gradually add the sifted powdered sugar, half a cup at a time, mixing on low speed after each addition.
Time: PT3M
Incorporate Cocoa and Salt
Sift in the cocoa powder and add the salt, then mix on low until fully combined.
Time: PT2M
Add Hot Fudge
Pour the hot fudge (or ganache) into the frosting and mix on medium‑low until the mixture is glossy and uniform.
Time: PT2M
Adjust Consistency
If the frosting is too thick, add heavy cream or milk one tablespoon at a time, up to 3 tablespoons, mixing after each addition.
Time: PT2M
Frost the Cake
Using an offset spatula, spread the chocolate buttercream evenly over the cooled cake, creating smooth swoops if desired.
Time: PT5M
Optional Garnish
Sprinkle toasted nuts, shaved chocolate, or chocolate sprinkles on top for extra texture and visual appeal.
Time: PT2M
Nutrition Facts
- Calories
- 800
- Protein
- 8g
- Carbohydrates
- 100g
- Fat
- 45g
- Fiber
- 5g
Dietary info: Vegetarian, Contains gluten, Contains dairy
Allergens: Wheat, Dairy, Eggs, Nuts (optional)
Ingredient Substitutions
- Instead of All-Purpose Flour: Cake Flour
- Instead of Dutch-Processed Cocoa Powder: Natural cocoa powder
- Instead of Baking Soda: Baking powder (increase amount)
- Instead of Baking Powder: Baking soda + cream of tartar
- Instead of Kosher Sea Salt: Table salt (use less)
- Instead of Granulated Sugar: Coconut sugar (adjust)
- Instead of Toasted Pecans or Walnuts: Almonds
- Instead of Buttermilk: Milk + 1 tbsp lemon juice
- Instead of Sour Cream: Greek yogurt
- Instead of Vegetable Oil: Canola oil, Melted butter
- Instead of Eggs: Egg replacer
- Instead of Vanilla Extract: Vanilla bean seeds
- Instead of Hot Coffee (or Boiling Water): Hot water
- Instead of Unsalted Butter: Margarine
- Instead of Powdered Sugar: Confectioners' sugar
- Instead of Dutch-Processed Cocoa Powder (Frosting): Natural cocoa powder
- Instead of Kosher Sea Salt (Frosting): Table salt
- Instead of Hot Fudge (or Chocolate Ganache): Chocolate ganache
- Instead of Heavy Cream or Milk: Milk
Equipment Needed
- Oven
- Large Mixing Bowl
- Medium Mixing Bowl
- Whisk
- Fine Mesh Sieve (optional)
- Measuring Cups
- Measuring Spoons
- Silicone Spatula
- 9x13 Inch Baking Pan
- Parchment Paper
- Non‑Stick Baking Spray (optional)
- Stand Mixer (optional)
- Offset Spatula (optional)
- Cooling Rack (optional)
Critical Steps — Do Not Skip
- Preheat Oven
- Sift Dry Ingredients
- Line Baking Pan
- Combine Wet and Dry
- Bake Cake
- Frost the Cake
Chef Tips from the Video
- Using hot coffee (or water) ‘blooms’ the cocoa for a deeper chocolate flavor without tasting coffee.
- Room‑temperature butter creams faster and yields a lighter frosting.
- A 50/50 oil‑butter blend in the batter gives a moist crumb that stays soft after refrigeration.
Troubleshooting
Cake is dry or crumbly
Make sure the coffee is hot and the batter isn’t overmixed; next time reduce baking time by 5‑10 minutes.
Dome-shaped top with undercooked center
Ensure all ingredients are at room temperature and avoid using cold liquids; bake on the middle rack.
Frosting is too thick
Add a tablespoon of heavy cream or milk at a time until the desired spreadability is reached.
Frosting is grainy
Sift both powdered sugar and cocoa powder thoroughly before adding; beat butter longer to create a smoother base.
Storage
Refrigerator: Store covered in the fridge for up to 5 days.
Freezer: Wrap tightly in plastic and foil; freeze for up to 3 months.
Room temperature: Not recommended beyond 2 hours due to buttercream softness.
Make-Ahead Tips
- Bake the cake a day ahead and keep it wrapped in the fridge; frost just before serving.
- Frosting can be made up to 2 days ahead and stored in an airtight container at room temperature.
- Freeze individual slices wrapped in plastic for quick desserts.
Frequently Asked Questions
What is the cultural significance and history of chocolate sheetcake in American dessert tradition?
Chocolate sheetcake became popular in mid‑20th‑century America as an easy, crowd‑pleasing dessert for potlucks and family gatherings. Its simple, one‑pan format made it affordable and convenient, while the addition of coffee reflects a classic technique to intensify chocolate flavor in American baking.
What regional variations of chocolate sheetcake exist within United States cuisine?
In the South, bakers often add a layer of cream cheese frosting or a pecan streusel. In the Midwest, a coffee‑infused version like this one is common, and some West Coast recipes incorporate avocado oil for a lighter crumb.
How is chocolate sheetcake traditionally served in American celebrations?
It is typically sliced into squares and served at birthdays, holidays, and community fundraisers. The cake is often topped with sprinkles, shaved chocolate, or a dusting of powdered sugar for a festive presentation.
What occasions or holidays is chocolate sheetcake especially associated with in American culture?
Chocolate sheetcake is a staple at birthday parties, school bake sales, Fourth of July picnics, and Thanksgiving potlucks because it can be made ahead and feeds a crowd easily.
What makes this chocolate sheetcake special compared to other American chocolate cakes?
The use of hot coffee to bloom the cocoa gives a richer, deeper chocolate flavor without adding bitterness, and the combination of buttermilk, sour cream, and oil creates a tender, moist crumb that stays soft for days.
What are the authentic traditional ingredients for American chocolate sheetcake versus acceptable substitutes?
Traditional ingredients include all‑purpose flour, Dutch‑processed cocoa, buttermilk, sour cream, vegetable oil, and coffee. Acceptable substitutes are Greek yogurt for sour cream, milk‑plus‑lemon for buttermilk, and melted butter for oil if a richer flavor is desired.
What are the most common mistakes to avoid when making this chocolate sheetcake?
Common errors include overmixing the batter, using cold liquids which cause uneven baking, and under‑baking which leaves a gummy center. Also, failing to sift cocoa can result in a lumpy frosting.
Why does this recipe use hot coffee instead of plain water for the liquid?
Hot coffee ‘blooms’ the cocoa powder, releasing more aromatic compounds and deepening the chocolate flavor without imparting a coffee taste. Water would hydrate the cocoa but wouldn’t enhance the flavor as effectively.
How do I know when the chocolate sheetcake is done baking?
The cake is done when the edges are set, the top springs back lightly when touched, and a toothpick inserted in the center comes out with a few moist crumbs but no wet batter.
Can I make this chocolate sheetcake ahead of time and how should I store it?
Yes. Bake the cake up to two days ahead, wrap it tightly in plastic, and refrigerate. Frost just before serving or store frosting separately in an airtight container at room temperature for up to 2 days.
What does the YouTube channel Preppy Kitchen specialize in?
The YouTube channel Preppy Kitchen specializes in approachable, family‑friendly recipes that emphasize quick preparation, clear step‑by‑step instructions, and practical cooking tips for home cooks of all skill levels.
How does the YouTube channel Preppy Kitchen's approach to American baking differ from other cooking channels?
Preppy Kitchen focuses on minimal equipment, uses everyday pantry staples, and often incorporates clever shortcuts—like using coffee to boost chocolate flavor—while other channels may rely on more specialized tools or elaborate techniques.
Last updated: September 6, 2026
