Extraordinary! Why Didn't I Think Of Making This Before? Very tasty

Custard cream:
200 ml milk
15 grams of butter
2 egg yolks
30 grams of sugar
15 grams of cornstarch
1 teaspoon vanilla

Dough Ingredients:
70 ml water
50 ml milk
10 grams of sugar
pinch of salt
65 grams of butter
65 grams of all-purpose flour
2 eggs