response: She chopped up a semi-sweet chocolate bar and added that to a cookie.
original_response: I believe Ruth kept the recipe a secret for many years after.
history: Hi. I'm baking cookies. Do you like to bake? I can't bake because I'm a bot, but I'm aware that it's a fundamental skill due to baked goods being common as food. One thing I like to bake is chocolate chip cookies. Do you know anything about their history? Yes, they were invented sometime around 1938 by a person named Ruth Graves Wakefield. How did that happen? I really can't say. Back to baking in general, it's very important for nutrition. Oh, OK. How did she make the chocolate chip cookies?
knowledge: Circa 1938, Ruth Graves Wakefield added chopped up bits from a Nestlé semi-sweet chocolate bar into a cookie.