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Ingredients
- 1 1/2 cups all-purpose flour
- 1 teaspoon baking powder
- 1 teaspoon salt
- 1/4 teaspoon baking soda
- 3/4 cup plus 2 tablespoons sugar, divided
- 8 tablespoons (1 stick) unsalted butter, at room temperature, divided
- 3 tablespoons extra-virgin olive oil
- 2 large eggs, at room temperature
- 1 teaspoon finely grated lemon zest
- 1 teaspoon finely grated orange zest
- 1 teaspoon Fiori di Sicilia or vanilla extract
- 1 cup sweet Moscato or other citrusy white dessert wine
- 1 1/2 cups red seedless grapes
- Luscious Lemon Sauce
- 1 cup lemon curd
- 1 (8-ounce) container mascarpone
Preparation
Step 1
Preheat the oven to 400ºF. Brush the inside of a 10-inch light-colored metal springform pan with olive oil. (A dark metal or nonstick pan makes the cake crust too dark and thick.) Line the bottom of the pan with parchment paper and then brush the parchment with olive oil.
Whisk together the flour, baking powder, salt, and baking soda together in a medium bowl.
Combine 3/4 cup of the sugar, 6 tablespoons of the butter, and the oil in a large bowl. Beat with an electric mixer until smooth. Add the eggs one at a time, beating well after each addition. Quickly beat in the lemon zest, orange zest, and extract.
Add the flour mixture in thirds, alternating with half of the wine, beating only until the batter is smooth after each addition.
Scrape the batter into the prepared pan and smooth the top. Sprinkle the grapes over the top of the batter. (The grapes will sink as the cake bakes.)
Bake until the top is just set, about 20 minutes. Dot the top of the cake with the remaining 2 tablespoons of butter and sprinkle with the remaining 2 tablespoons of sugar. Continue baking until the top of the cake is golden and a cake tester inserted into the center comes out clean, about 20 minutes more.
Cool the cake in the pan on a wire rack for 20 minutes before removing the pan rim. Serve the cake slightly warm or at room temperature topped with a generous spoonful of Luscious Lemon Sauce.
Luscious Lemon Sauce
Makes about 2 cups
Whisk together the lemon curd and mascarpone in a small bowl until very smooth and creamy. Serve at room temperature.
Make-ahead note: Store covered and refrigerated for up to one week. Return to room temperature and stir well before serving.