What sauce does the restaurant dip steamed bread in?

That sauce is condensed milk sauce, a dairy product, which is sold in supermarkets.

Practice of dipping steamed bread condensed milk sauce in restaurants;

Prepare ingredients

All materials should be prepared, heated and stirred constantly, and don't stick to the pot. Boil it a little and pour it into the pot.

Gradually thicken, bubbles appear, turn off the heat and pour in the egg yolk.

accomplish