Cream the butter and sugar together.
Add the flour and make a dough.
Roll out the dough thinly and press it into tart molds.
Dissolve milk, heavy cream, and sugar over medium heat.
Mix eggs and vanilla extract together.
Pour the egg mixture into the milk mixture and mix well.
Pour the filling into the tart molds.
Bake in a 200℃ oven for 20 minutes.
Bake a little longer until the top is golden brown.