Raspberry Lemon Cupcakes with Mascarpone Frosting

Name: Raspberry Lemon Cupcakes with Mascarpone Frosting
Prep time: 20 min
Cook time: 20 min
Total time: 40 min
Cuisine: American
Ingredients: 1/2 cup unsalted butter (melted); 1 cup granulated sugar; 2 large eggs (room temperature); 1 teaspoon vanilla extract; 2 tablespoons lemon zest; 1 tablespoon lemon juice; 1/2 cup full-fat plain yogurt (substitute sour cream or whole milk); 1 1/2 cups cake flour (substitute all purpose flour); 1 1/4 teaspoon baking powder; 1/4 teaspoon kosher salt; 12 ounces raspberries (fresh or frozen); 1/2 cup granulated sugar; 2 teaspoon lemon juice; 1 tablespoon cornstarch (optional); 1/2 cup unsalted butter (room temperature); 8 ounces mascarpone cheese (room temperature ); 4 cups powdered sugar; 1-2 tablespoons raspberry jam