Custard

Custard is a mixture of egg yolks and milk used primarily as a cream for desserts. It has existed in European cuisine since as long as Ancient Rome, and was particularly popular in the Middle Ages for the creation of custard tarts.

Golden Dawn was a brand of custard powder available in the United States of America in 1926.

Known uses

 * In the 1992 Welcoming Feast at Hogwarts School of Witchcraft and Wizardry, a custard tart was served, which Albus Dumbledore remarked as "delicious-looking."
 * In 1995, Molly Weasley used custard with her rhubarb crumble at 12 Grimmauld Place.
 * From 1996 onwards, Weasleys' Wizard Wheezes sold a Self-Propelling Custard Pie. This pie was presumably bewitched to automatically throw itself at unsuspecting victims.