Preheat the oven to 350°F (175°C) and line a cupcake pan with liners.
In a large bowl, cream together the softened butter and granulated sugar until light and fluffy.
Add eggs one at a time, beating well after each addition. Stir in vanilla extract.
Gradually fold in the flour alternating with milk, beginning and ending with flour. Mix until just combined.
Fill cupcake liners 2/3 full with batter and bake for 18-20 minutes, or until a toothpick inserted in the center comes out clean.
For the frosting, beat the mascarpone cheese, chilled heavy cream, and powdered sugar together until thick and spreadable.
Once cupcakes are completely cool, spread or pipe the mascarpone frosting on top.
Garnish with chopped fresh strawberries before serving.