These are some of the easiest, most delicious chocolate chip cookies I have ever made! I had already mixed the dough and had it on cookie sheets ready to bake before my oven was even preheated.
In a large mixing bowl, combine softened butter, brown sugar, vanilla, and egg. Fold in Bisquick baking mix. Stir in chocolate chips. Roll dough into 1" balls and place on ungreased cookie sheets.