Submitted by Judy on Thu, 05/23/2013 - 9:32pm.

A delightful Internet urban legend concerns a diner who supposedly tasted this scrumptious cookie at the Neiman-Marcus Cafe and asked for the recipe. When her request was denied, she asked if she could purchase it, and the waitress quoted her two-fifty. When she got her monthly statement, the store had charged her $250! She tried to return it, but was again denied, so she vowed to get even by faxing and emailing this recipe to everyone she knew and asking them to pass it on to others. (A lovely hoax, but at least this one isn’t scaring the bejeebies out of us about carjackings and exploding cell phones.) 
Years ago I saw the same recipe touted as Mrs. Fields' classic, although Mrs. Fields too has denied it. But everyone I've ever served them to says who cares if it's the original. It's just as good or better!

5 cups rolled oats
4 cup all-purpose flour
1 teaspoon salt
2 teaspoons baking powder
2 teaspoons baking soda
1 pound (4 sticks) unsalted butter, at room temperature 
2 cups granulated sugar
2 cups brown sugar
4 large eggs
2 teaspoons pure vanilla extract
24 ounces chocolate chips
1 Hershey chocolate bar (8 ounces), grated
3 cups chopped walnuts

1. Preheat the oven to 375° F.  Have ready several ungreased baking sheets.
2. Process the oatmeal in a blender to a fine powder and place in a large bowl. Stir in the flour, salt, baking powder, and baking soda and set aside.
3. Cream the butter and both sugars with an electric mixer at medium speed until smooth and creamy, about 90 seconds. Add the eggs and vanilla and beat until combined, about 1 minute more. Reduce the speed to low and blend in the flour mixture just until incorporated. Stir in the chocolate chips, grated chocolate, and walnuts.
3. Roll into balls the size of golf balls and place 2 inches apart on the baking sheets. Bake one sheet at a time on the center oven rack until brown around the edges, 10 to 12 minutes. Cool the cookies in the pan set on a wire rack until they can be easily lifted, 1 to 2 minutes. Return the cookies to the rack to cool completely. Best eaten the same day they’re baked and frozen up to 3 months (although they taste best if frozen up to 2 weeks). Thaw completely before unwrapping. Or store in a tin up to 3 days.
Makes about 9 dozen