Preheat the oven to 200°C (392°F).
Cut the puff pastry to fit the molds and place them in the molds.
Mix eggs, milk, sugar, and vanilla extract together well to make the filling.
Pour the filling into the pastry molds.
Bake in the oven for 20–25 minutes.
Let them cool, then remove the finished egg tarts from the molds.