The chocolate chip cookie was an accident!

Before there were chocolate chip cookies, it was either sugar or complete chocolate. This all changed in the year 1930 when a woman by the name Ruth Graves Wakefield was baking. The story goes that she was attempting to make chocolate cookies, but was running low on baker’s chocolate so instead added broken pieces of semi-sweet chocolate from Nestlé, expecting the chocolate to mix in the batter. 

To her surprise, and cookie lovers around the world’s joy, the chocolate did not mix and large chunks of semi-sweet chocolate were stuck in the baked cookies making the cookie we know today! Graves sold her recipe to Nestlé in exchange for a life time supply of chocolate chips, and if you look on the back of Nestlé’s chocolate chip cookie box the recipe is still there! 

(Source)