Valentine's Day Cupcakes

Ingredients

• ***For the cupcakes:***
• 1/2 cup seedless strawberry jam or preserves, warmed
• 1 1/2 sticks butter, softened
• 1 cup granulated sugar
• 3 large egg whites, room temperature
• 1 teaspoon vanilla extract
• 1 cup 2% milk
• 1/2 cup sour cream
• 1 2/3 cups all-purpose flour
• 1 teaspoon baking powder
• 1/4 teaspoon baking soda
• 1/4 teaspoon salt
• red food coloring, optional, to taste
• ***For the frosting:***
• 2 cups heavy cream
• 1/2 cup confectioners' sugar
• 1/2 teaspoon vanilla extract
• fresh strawberries, optional, to taste, halved, for garnish