HONOLULU (KITV) - Tuesday marks National Chocolate Chip Day!

Chocolate chip cookies are credited to Ruth Graves Wakefield.  The Massachusetts woman was a Toll House Inn employee in 1937.

One day she decided to put chopped up pieces from a Nestle chocolate bar in a cookie recipe.

The chocolate chip cookies were a hit, and Wakefield inked a deal with Nestle.  She gave the company her recipe and they gave her chocolate for life.

Chocolate chips were originally semi-sweet.  They now come in a variety of flavors including mint, white chocolate and bittersweet.