Chocolate Chip Cookie
Chocolate lovers everywhere bow to the greatness that is Ruth Wakefield's accidental creation — the chocolate chip cookie. Wakefield was the owner and occasional cook of the Toll House Inn in Whitman, Massachusetts. One day Wakefield was making a batch of chocolate cookies when she ran out of baker's chocolate. Improvising, she used broken pieces from a Nestlé semi-sweet chocolate bar thinking the dough would absorb the melted pieces. Instead, she accidentally created chocolate chip cookies.
Wakefield called the cookies "Toll House Crunch Cookies" and the recipe was eventually published in a Boston newspaper. This got the attention of Andrew Nestlé, the chocolate provider whose chocolate was used in Wakefield's fruitful mishap. In exchange for a lifetime supply of chocolate, Wakefield agreed to let Nestlé print her cookie recipe on their chocolate packaging. You can still find the Toll House cookie recipe on Nestlé packaging today!
Info from Grandparents.com