Who is the french queen who said let them eat cake?

This quotation is popularly attributed to Marie Antoinette, the wife of King Louis XVI and the last Queen of France. In response to the news that the French peasants had no bread and were starving, she allegedly said, "let them eat cake." However, she never actually said that. Even though the quotation is attributed to her, it was actually spoken a century before by Marie-Therese, wife of Louis XIV. It was a callous and ignorant statement and she, Marie Antoinette, was neither. See the Related Links below.

The quote was: 'Let them eat brioche' but its unlikely that she ever said this. (A brioche is a very enriched bread, more like a cake.)

The expression first appeared in The Confessions of Jean-Jacques Rousseau, completed in 1769 when Marie Antoinette was 13, where he wrote:

"Enfin je me rappelai le pis-aller d'une grande princesse à qui l'on disait que les paysans n'avaient pas de pain, et qui répondit : Qu'ils mangent de la brioche."

Translation:

"Finally I recalled the last resort of a great princess who was told that the peasants had no bread, and who responded: "Let them eat brioche."

This is the only recorded use of the expression. The 'great princess' was clearly someone else.