Vanilla Cup Cake

Ingredients:

For the pastry:
1 1/2 cups all-purpose flour
1/2 teaspoon salt
1/2 cup (1 stick) unsalted butter, cold and cut into small pieces
1/4 cup ice water
For the filling:
1 1/2 cups whole milk
1 vanilla bean, split lengthwise
1/2 cup sugar
4 large egg yolks
1/4 cup all-purpose flour
1 tablespoon unsalted butter, melted
1/2 teaspoon vanilla extract