Brioche

Brioche are made from doughs enriched with eggs and butter. In France, the number of eggs and quantity of butter mixed into the dough depends in part on how much money you have at your disposal. The wealthier you are the more butter you sneak in. The recipe I used -- converted from yeast to sourdough, of course -- absorbed five eggs and two sticks of butter.

Enriched is something of an understatement.