Upside-Down Grape and Mascarpone Cheesecake Recipe | Epicurious

Ingredients

• Nonstick vegetable oil spray
• 3 1/4 cups red seedless grapes, divided
• 2 tablespoons frozen grape juice concentrate (with Concord grapes), thawed
• 1 cup sugar, divided
• 2 teaspoons cornstarch
• 1 1/2 teaspoons raspberry vinegar
• 1 1/2 8-ounce packages cream cheese, room temperature
• 1 1/2 tablespoons all purpose flour
• 1 8-ounce container mascarpone cheese*
• 3 large eggs