Fresh Grape Cake With Luscious Lemon Sauce

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, for serving (recipe follows)