Supposedly this is the "urban legend" chocolate chip cookie recipe. Some lady wanted to buy the recipe from a company and was told it would cost "two fifty". She was excited and bought it for....$250 and as a results decided to spill the company's secret recipe. Either way, it makes some d@mn fine cookies.
1 cup butter, softened
1 cup white sugar
1 cup packed brown sugar
1 teaspoon vanilla extract
1/2 teaspoon cinnamon
2 cups all-purpose flour
2 1/2 cups rolled oats
1/2 teaspoon salt (if using salted butter, omit extra salt)
1 teaspoon baking powder
1 teaspoon baking soda
2 cups semisweet chocolate chips
4 ounces semisweet chocolate, grated (I just use a butcher knife and chop up Baker's baking chocolate squares on a cutting board)
Preheat oven to 325 degrees.
In a large bowl, cream together butter and sugars. Beat in the eggs one at a time, then stir in the vanilla and cinnamon. In a separate bowl, mix together flour, oats, salt, baking powder, and baking soda. Add dry ingredients to butter and sugar mixture. Mix together. Add chocolate chips and grated chocolate.
Drop by rounded teaspoons onto lightly-greased cookie sheets. Place in freezer for 1-2 minutes or refrigerator for about 4 minutes to firm up dough before baking. This prevents the cookie from becoming flat and crispy.
Bake for about 8 minutes in the preheated oven (removing right before they are about to turn golden) for soft, chewy cookies. Let sit 1 minute on cookie sheet then use a pancake spatula to remove and let cook on cookie racks.
I like to make a full recipe, cook a dozen, and freeze the rest as logs of cookie dough that I wrap well with saran wrap and then aluminum foil. That way, I can have a hot cookie fresh out of the oven whenever I crave them. Which is pretty often.