Sangria Cupcakes with Buttercream Frosting - The Perfect Puree of Napa Valley

Ingredients

• 1/2 cup The Perfect Purée Red Sangria blend, thawed
• 2 1/2 cups flour
• 1 1/2 tsp. baking powder
• 3/4 tsp. baking soda
• 1/2 tsp. salt
• 3/4 cup sugar
• 2 eggs
• 4 oz. butter
• 1/2 cup sour cream
• 1/2 cup chopped strawberries
• 1/4 cup blueberries
• 1/4 cup red wine
• 1 1/4 cups sugar
• 2/3 cup water
• 5 large egg whites
• 1 pound (4 sticks) unsalted butter
• 1/4 tsp salt