If you’re looking for something, say…less funfetti-pastel-swirl-sprinkle-coated for your next adult party, this deeply chocolatey and espresso gilded beauty might be exactly what you want. No baby-pink sparkles, here. Just an ultra rich and barely sweet cake with a whisper of luxurious frosting. Happy birthday, indeed.–Jenny Latreille

CAN I MAKE FROSTING IN A FOOD PROCESSOR?

Yes. In fact, don’t even think about using a stand mixer, handheld mixer, whisk, or spoon to make the espresso frosting. It needs to be a food processor. And make sure to keep it running for the required amount of time.

A whole sour cream mocha cake on a white decorative cake stand.
A sour cream mocha cake with espresso frosting on a cake stand with a slice cut from it.

Sour Cream Mocha Cake

4.59 / 12 votes
This sour cream mocha cake is a knockout. Made with unsweetened chocolate and instant espresso, it’s wicked dense, intense, chocolatey, and easy to toss together from ingredients you already have at home with an espresso frosting that’s as light as the cake is dense. A very “adult” dessert.
David Leite
CourseDessert
CuisineAmerican
Servings12 servings
Calories501 kcal
Prep Time25 minutes
Cook Time1 hour 35 minutes
Total Time2 hours

Ingredients 

For the mocha cake

  • 4 ounces unsweetened chocolate, grated
  • 2 cups granulated sugar
  • 1 1/2 cups all-purpose flour, plus more for the pans
  • 3/4 teaspoon baking soda
  • 1/2 teaspoon kosher salt
  • 5 teaspoons instant espresso granules, dissolved in 1 cup of hot water
  • 1/2 cup sour cream, not fat-free
  • 1/4 cup (2 oz) unsalted butter, melted, plus more for the pans
  • 1/4 cup mild vegetable oil
  • 2 teaspoons vanilla extract
  • 1 teaspoon chocolate extract, or omit and up the vanilla to 1 tablespoon
  • 2 large eggs, at room temperature, beaten

For the espresso frosting

  • 1/4 cup instant espresso granules, dissolved in 5 tablespoons of cold water
  • 1 stick (4 oz) stick unsalted butter, at room temperature
  • 1 1/4 cups confectioners’ sugar
  • 3/4 cup plus 2 tablespoons heavy cream

Instructions 

Make the sour cream mocha cake

  • Crank the oven to 350°F (175°C) and adjust the oven rack to the middle position. Butter two 8-inch (20-cm) cake pans and line the bottoms with parchment paper. Butter and flour the paper, tapping out any excess flour.
  • Melt the chocolate, either in a microwave on medium or in a pot set over another pot filled with an inch of simmering water. (Make sure no water splashes into the chocolate or it’ll become grainy. And then you’ll become grouchy.) Remove from the heat to cool until just warm.
  • Meanwhile, dump the sugar, flour, baking soda, and salt in the bowl of a stand mixer fitted with a paddle attachment.
  • In a bowl, whisk together the hot espresso, sour cream, oil, butter, and vanilla and chocolate extracts. Pour the espresso mixture into the flour mixture in the stand mixer and mix on low until just blended, about 30 seconds.
  • Slowly drizzle in the beaten eggs and mix on medium until smooth. Scrape in the melted chocolate and beat until the batter is uniform in color, about 15 seconds. The batter will be thin but that’s how it should be.
  • Divide the batter evenly between the 2 pans and bake for 30 to 40 minutes, until a tester comes out clean. Move the cakes to a wire rack to cool for 10 minutes. Run a sharp knife around the edge of each cake and invert them onto another rack to cool completely.

Make the espresso frosting

  • Dissolve the espresso granules in the water.
  • Pour the espresso mixture into a food processor and add the butter, sugar, and heavy cream. Process until it becomes light and fluffy, about 5 minutes. The frosting will initially look curdled and destroyed. And then just when you’re about to lose all faith, everything will come together beautifully. Swear.

    ☞ TESTER TIP: You simply must use a food processor for the frosting. Seriously. Or the frosting won’t come together.

Assemble the cake

  • Place 1 cake on a cake stand or serving plate. Frost the top and then stack the second cake on top. Frost the top and sides. Devour immediately.

Notes

Decaf Sour Cream Mocha Cake variation

If you’re sensitive to caffeine, you may get a subtle buzz from this cake. Rather than risk a sleepless night if you tend to eat a late dessert, simply make the recipe with decaffeinated espresso. The intense mocha flavor won’t be affected in the least.

Nutrition

Serving: 1 sliceCalories: 501 kcalCarbohydrates: 65 gProtein: 5 gFat: 27 gSaturated Fat: 17 gTrans Fat: 1 gCholesterol: 77 mgSodium: 194 mgFiber: 2 gSugar: 46 g

Nutrition information is automatically calculated, so should only be used as an approximation.

Tried this recipe?Mention @leitesculinaria or tag #leitesculinaria!
Recipe © 1999 David Leite. Photo © 2019 David Leite. All rights reserved.

[recipe-testers-choice]




About David Leite

I count myself lucky to have received three James Beard Awards for my writing as well as for Leite’s Culinaria. My work has also appeared in The New York Times, Martha Stewart Living, Saveur, Bon Appรฉtit, Gourmet, Food & Wine, Yankee, Los Angeles Times, Chicago Tribune, The Washington Post, and more.


Hungry For More?

Flourless Chocolate Cloud Cake

This lofty cake is so crammed full of chocolate and butter and air, there’s no room for flour–although we made sure to leave space for ample swoops of softly whipped cream.

1 hr 15 mins

Chocolate Caramel Cake

For this stunning dessert, rich chocolate cake and salty-sweet caramel frosting collide to make a magnificent masterpiece.

6 hrs

Hershey’s Chocolate Frosting

Sometimes simpler is better. Proof? This classic chocolate frosting from the back of the tin of Hershey’s cocoa. We dare you to not just eat it straight from the spoon.

10 mins


4.59 from 12 votes (3 ratings without comment)

Leave a comment

Your email address will not be published. Required fields are marked *

Recipe Rating





43 Comments

  1. Lies! It’s all lies about needing a food processor! If you really, really soften the butter (enough that you can whip it by hand with a whisk) you can slowly add in the rest of the icing ingredients.I mixed together the cream/coffee granules/water/icing sugar, let the icing sugar dissolve into the liquid and then added that mixture a couple tablespoons at a time to the super soft butter and hand whisked until it was smooth before adding more. Then I put it in the mixer with the whisk attachment and beat it for a couple minutes to fluff it up. You might need to chill it for a bit to get it really fluffy. I’m sure it takes much more effort than doing it in the food processor, but if you don’t have one it does work in the end (and it’s worth it!).

    1. Love it, mc! Thanks! As someone who doesn’t have a food processor, I’m grateful to hear it….

    1. Exactly, Beth. Exactly. (See? Now HERE is an instance where I approve of the use of frosting…)

        1. Yes, shared frosting ground. Uh, how do you feel about frosting straight from the beaters?

  2. Something about sour cream & baking…great flavor and wonderful texture or crumb. Lovely cake ~ I pinned! Thanks for the link love, too ๐Ÿ™‚

    1. We couldn’t agree more, Maria. Sour cream just adds that extra oomph of creaminess or moistness, yes? I’m a sucker for old-fashioned doughnuts made with sour cream. Anyways, thanks for your kind words, and you’re very welcome for the link love.