Ina Garten Birthday Chocolate Sheet Cake Recipe

Ina Garten Birthday Chocolate Sheet Cake Recipe is a classic American dessert dinner party staple. This moist cake uses dark cocoa and hot coffee to create a deep flavor, topped with a thick layer of chocolate frosting.

The first time I made this, I thought the batter looked way too thin and almost added more flour. Now I always trust the liquid state of the mixture because that’s what makes the crumb so tender. If you try to thicken it up, you’ll end up with a tough, bread-like texture instead of a soft cake.

The hot coffee is doing more work than you’d think here. It doesn’t make the cake taste like a latte, but it blooms the cocoa powder to make the chocolate taste much stronger. I’ve found that using the best quality vanilla extract you can find really changes how the frosting tastes against the salt.

Ina Garten Birthday Chocolate Sheet Cake Recipe Ingredients

For the Cake

• 2 cups (250g) all-purpose flour
• 2 cups (400g) sugar
• 3/4 cup (75g) good cocoa powder
• 2 teaspoons baking soda
• 1 teaspoon baking powder
• 1 teaspoon kosher salt
• 1 cup (240ml) buttermilk, shaken
• 1/2 cup (120ml) vegetable oil
• 2 extra-large eggs, at room temperature
• 1 teaspoon pure vanilla extract
• 1 cup (240ml) freshly brewed hot coffee

For the Frosting

• 6 ounces (170g) good semisweet chocolate
• 1/2 pound (225g) unsalted butter, at room temperature
• 1 extra-large egg yolk, at room temperature
• 1 teaspoon pure vanilla extract
• 1 1/4 cups (150g) sifted confectioners’ sugar
• 1 tablespoon instant coffee granules

How To Make Ina Garten Birthday Chocolate Sheet Cake Recipe

• 1. Prep the oven and pan: Heat your oven to 180°C (350°F). Butter a 9x13x2-inch baking pan and line the bottom with parchment paper, then butter and flour the pan again.
• 2. Sift the dry ingredients: Sift the flour, sugar, cocoa, baking soda, baking powder, and salt into the bowl of an electric mixer fitted with a paddle attachment. Mix on low speed until everything is combined.
• 3. Combine the wet ingredients: In a separate glass measure or bowl, whisk together the buttermilk, oil, eggs, and vanilla. This ensures the eggs are fully broken up before they hit the flour.
• 4. Mix the batter: With the mixer on low speed, slowly add the wet ingredients to the dry ones. Stir until just combined, scraping the bottom of the bowl with a rubber spatula to catch any hidden flour pockets.
• 5. Add the hot coffee: Pour the hot coffee into the batter while the mixer is still on low. The batter will be very thin and watery, but don’t panic.
• Pouring the hot liquid in last helps dissolve the cocoa properly. This step creates a smooth, pourable consistency that spreads evenly across the large sheet pan without needing to be pushed around.
• 6. Bake the cake: Pour the batter into the prepared pan and bake for 35 to 40 minutes. Test the center with a toothpick; it should come out clean when the cake is done.
• 7. Cool the cake: Let the cake cool completely in the pan on a wire rack. Don’t try to frost it while it’s even slightly warm or the butter in the frosting will melt and slide off.
• 8. Melt the chocolate: Chop the chocolate and place it in a glass bowl set over a pan of simmering water. Stir until smooth, then set it aside to cool until it reaches room temperature.
• 9. Cream the butter: Beat the butter in the bowl of an electric mixer fitted with the paddle attachment on medium-high speed for about 3 minutes. It should look pale and very fluffy.
• 10. Finish the frosting: Add the egg yolk and vanilla and beat for another minute. Turn the mixer to low, add the confectioners’ sugar, and then the coffee granules dissolved in 2 teaspoons of hot water.
• 11. Add the chocolate: Pour in the cooled chocolate and mix until just blended. Don’t overbeat this or you’ll put too many air bubbles into the frosting.
• 12. Frost the cake: Spread the frosting over the top of the cooled cake with an offset spatula. Make big swirls with the back of a spoon to give it that classic home-baked look.

Recipe Tips

• 1. Use room temperature eggs. Cold eggs won’t emulsify properly with the oil and buttermilk. If you forgot to take them out, put them in a bowl of warm water for five minutes before cracking.
• 2. Sift the confectioners’ sugar. Even small lumps of sugar will show up in this dark frosting. Taking a minute to run it through a fine-mesh strainer ensures the finish stays silky and professional.
• 3. Don’t overbake the edges. Since this is a wide, flat cake, the corners can dry out quickly. Start checking the cake at 30 minutes to make sure the middle is set but the sides aren’t becoming crunchy.
• 4. Quality chocolate matters. Since the frosting isn’t cooked, you’ll taste every bit of the chocolate you choose. Use a bar with at least 60% cocoa for the best balance against the sweet sugar.
• 5. Dissolve the coffee granules fully. Make sure the instant coffee is completely liquid before adding it to the butter. If there are tiny grains left, they’ll leave dark streaks and bitter spots in the frosting.
• 6. Make it ahead of time. This cake actually tastes better the day after it’s made because the flavors have time to settle. You can bake and frost it 24 hours before you need to serve it.

What To Serve With Birthday Chocolate Sheet Cake

A big scoop of vanilla bean ice cream or a dollop of cold whipped cream is great. The cold dairy helps cut through the weight of the dark chocolate frosting.

Fresh raspberries or sliced strawberries on the side provide a nice bit of tartness. You could also serve it with a glass of ice-cold milk for a classic childhood feel.

How To Store Birthday Chocolate Sheet Cake

• Fridge: Cover the pan tightly with plastic wrap or move slices to an airtight container. It stays fresh and moist for up to five days when kept cold.
• Reheat: The microwave is the easiest way to take the chill off a single slice. Heat it for about 10 seconds just until the frosting starts to soften but doesn’t melt into a puddle.
• Freeze: Wrap individual slices in plastic wrap and then foil to prevent freezer burn. They’ll keep for three months, but you should thaw them in the fridge overnight before eating.

Ina Garten Birthday Chocolate Sheet Cake Recipe Nutrition Facts

Per serving (1 of 12):

• Calories: 540 kcal
• Protein: 6g
• Fat: 32g
• Carbohydrates: 62g
• Sugar: 48g
• Sodium: 310mg

FAQs

Why is the batter for Ina Garten Birthday Chocolate Sheet Cake Recipe so thin?

The batter is liquid because of the high ratio of buttermilk and hot coffee compared to the flour. This thin consistency is exactly what creates a soft, moist crumb that doesn’t get dry in the oven.

Can I use natural cocoa powder instead of Dutch-processed?

Yes, but the cake will be lighter in color and have a slightly different tang. Dutch-processed cocoa gives you that dark, almost black appearance that people expect from this specific recipe.

Can I make this cake without the coffee?

No, because the boiling liquid is needed to activate the leavening agents and bloom the cocoa. If you hate the taste of coffee, just use boiling water instead and you won’t lose the structural benefits.

Why did my frosting turn out grainy?

This usually happens if the butter was too cold or the melted chocolate was still too hot when you mixed them. Both ingredients need to be close to the same temperature to blend into a smooth mixture.

Can I bake this Ina Garten Birthday Chocolate Sheet Cake Recipe as cupcakes?

Yes, you just need to reduce the baking time to about 20 minutes. Fill the liners about two-thirds full so they don’t overflow and lose their shape while rising.

Try More Cake Recipes:

• Ina Garten German Chocolate Cake
• Ina Garten Lemon Poppyseed Cake
• Blueberry Crumb Cake
• Blueberry Ricotta Breakfast Cake
• Chocolate Mocha Icebox Cake
• Bittersweet Chocolate Cake