Preheat the oven to 350 degrees and line a muffin tin with four paper liners.
In a medium bowl, whisk together the flour, granulated sugar, baking powder, and salt.
In a separate bowl, mix the milk, melted butter, egg, and vanilla extract until smooth.
Pour the wet mixture into the dry ingredients and stir until just combined.
Divide the batter evenly among the four liners and bake for 18 minutes, or until a toothpick comes out clean.
Let the cupcakes cool completely on a wire rack.
Use a small knife to cut a cone-shaped piece from the center of each cupcake and fill the hole with raspberry preserves.
In a clean bowl, beat the powdered sugar, cream cheese, and remaining tablespoon of milk until creamy.
Spread or pipe the frosting over the filled cupcakes.