Custard Cream:

A bright kitchen scene with ingredients for making Irresistible Custard Cream Steamed Buns laid out: milk, butter, egg yolks, sugar, cornstarch, vanilla extract, warm milk, sugar, instant yeast, low-protein flour, salt, baking powder, and cooking oil. The scene is inviting and ready for baking.
A bright kitchen scene with a person heating milk and butter in a saucepan until it simmers, and then whisking egg yolks, sugar, cornstarch, and vanilla extract in a bowl to make custard cream. The kitchen environment is clean and inviting.
A bright kitchen scene with a person combining warm milk, sugar, and instant yeast in a bowl until frothy, then adding flour, salt, baking powder, and cooking oil to form a dough. The kitchen environment is clean and inviting.
200 ml milk
15 grams butter
2 egg yolks
35 grams sugar
15 grams cornstarch
1 teaspoon vanilla extract

Dough Ingredients:

125 ml warm milk
25 grams sugar
3 grams instant yeast
220 grams low-protein flour (all-purpose flour can be used)
1/4 teaspoon salt
1/2 teaspoon baking powder
20 ml cooking oil