Olive Oil Cake With Roasted Grapes and Ganache Recipe

This moist olive oil cake is made with cornmeal and flavored with orange, sweet olive oil-roasted grapes, and a thin coating of bittersweet chocolate ganache

By
Carrie Vasios Mullins
Carrie Vasios Mullins is a contributing writer at Serious Eats.
Carrie Vasios Mullins is the former national editor at Serious Eats, with a focus on all things sweet.
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Updated March 10, 2025
Closeup of a slice of Olive Oil Cake With Roasted Grapes and Ganache

Serious Eats / Carrie Vasios Mullins

Why It Works

  • Slowly roasting the grapes in the oven concentrates their sweetness.
  • Grapes and chocolate actually make a wonderful pairing, especially when that chocolate is dark.
  • Stone-ground cornmeal gives the crumb texture.
  • Fresh orange juice and zest add a freshness to the cake and also provides a nice contrast to the chocolate ganache.
  • Fruity olive oil rounds out the flavor of the cake and adds a subtle savory element.

I have a nephew who's about 20 months old. It's my first time as an aunt (though a niece is on the way) and he's generally the first baby I've spent any time in close quarters with. It's an old adage but a true one that when you're with someone that er, new, you see the world with fresh eyes. You realize that walking isn't as obvious as it looks, that pants are a drag, that toes are pretty hilarious, and that Sesame Street is one giant pearl of wisdom. Oh, and that those humble purple bobbles, grapes, are actually small globes of perfect sweetness.

You know what else grapes are? Available year-round in basically every supermarket, large or small, in America. And yet they're pathetically underused when it comes to baking. This is in large part due to their high water content—like melons and even strawberries, when baked, they tend to leak and cause a mushy cake crumb. But we bake with grapes in their dehydrated form (a.k.a raisins, another baby favorite) so I thought, what about making grapes that land somewhere in the middle of the juicy spectrum?

That's how I ended up tossing some seedless purple grapes with olive oil and slow roasting them in a 325°F (165°C) oven until they shriveled, losing juice but gaining sweetness.

Olive oil pairs with olive oil, naturally, so I folded the grapes into an orange-scented olive oil cake. I used half all purpose flour and half stone ground cornmeal in order to give the cake some texture but keep it fluffy. Then, to make it into something elegant and a true dessert, I enrobed the whole thing in a thin layer of bittersweet chocolate ganache.

Did you know that making chocolate ganache is as easy as bringing cream to a boil, adding some chopped chocolate, then stirring it until it melts? Probably not (they don't teach that on Sesame Street; I guess I've finally found a hole) but now that you know, you shouldn't shy away from this last step.

The resulting cake is tender yet texturally interesting and lightly scented with orange as well as the grassy notes of olive oil. The grapes add sweetness and a port-like flavor that marries perfectly with the rich, smooth, dark chocolate coating.

May 2014

Recipe Details

Olive Oil Cake With Roasted Grapes and Ganache Recipe

Prep 15 mins
Cook 2 hrs
Active 60 mins
Cooling Time 80 mins
Total 3 hrs 35 mins
Serves 8 servings
Cook Mode (Keep screen awake)

Ingredients

For the Roasted Grapes:

  • 2 cups seedless purple grapes, stemmed

  • 1 teaspoon olive oil

For the Cake:

  • 1/2 cup plus 2 tablespoons stone-ground cornmeal

  • 1/2 cup all-purpose flour

  • 1/2 teaspoon baking powder

  • 1/2 teaspoon salt

  • 4 large eggs, lightly beaten

  • 3/4 cup sugar

  • 1 tablespoon zest and 1/4 cup fresh juice from about 1 medium orange

  • 1/2 cup extra virgin olive oil

For the Ganache:

  • 5 ounces bittersweet chocolate

  • 1/2 cup heavy cream

  • 2 tablespoons granulated sugar

  • 2 tablespoons water

Directions

  1. Roast the grapes: Adjust oven rack to middle position and preheat oven to 325°F (165°C). Place grapes on baking sheet and toss with olive oil. Roast until soft and shriveled, about 1 hour. Let cool completely.

  2. Make the cake: Grease cake pan with oil or butter. Increase oven temperature to 350°F (175°C). In a small bowl, whisk together cornmeal, flour, baking powder, and salt; set aside.

  3. In a large bowl, whisk together eggs and sugar until lightened in color, about 3 minutes. Whisk in orange zest, followed by olive oil and orange juice. Add dry ingredients to the bowl and whisk until no clumps are left. Stir in roasted grapes.

  4. Pour batter into prepared pan and smooth top, tapping pan to make sure grapes are evenly distributed. Bake until a cake tester inserted into the middle of the cake comes out clean, 50 minutes to 1 hour. If top is starting to get too brown, cover with foil and continue baking.

  5. Let cake cool for 15 minutes then release from springform pan to continue to cool. Meanwhile, make the ganache.

  6. Make the ganache: Place cream, sugar, and water in a medium saucepan over medium heat. When cream comes to a boil, take off heat and add in chocolate, stirring until chocolate is completely dissolved and mixture is smooth.

  7. Place cooled cake on a cake rack set over a baking sheet or other large dish. Pour glaze over the cake (there will be overflow) and smooth over top and sides using an offset spatula. Transfer cake to refrigerator and chill until glaze is set, about 20 minutes. Keep cake in refrigerator, loosely covered with plastic wrap, if not eating right away.

Special Equipment

baking sheet, 9-inch springform pan, mixing bowls, whisk, saucepan, off-set spatula

Nutrition Facts (per serving)
502Calories
32gFat
49gCarbs
8gProtein
×
Nutrition Facts
Servings: 8
Amount per serving
Calories502
% Daily Value*
Total Fat 32g40%
Saturated Fat 12g60%
Cholesterol 110mg37%
Sodium 211mg9%
Total Carbohydrate 49g18%
Dietary Fiber 4g15%
Total Sugars 29g
Protein 8g
Vitamin C 5mg26%
Calcium 66mg5%
Iron 5mg25%
Potassium 320mg7%
*The % Daily Value (DV) tells you how much a nutrient in a food serving contributes to a daily diet. 2,000 calories a day is used for general nutrition advice.
(Nutrition information is calculated using an ingredient database and should be considered an estimate.)

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