Mrs. Field's Cookies

2 cups butter
2 cups granulated sugar
2 cups brown sugar
4 eggs
2 tablespoons vanilla extract
4 cups all-purpose flour
5 cups oatmeal
1 teaspoon salt
2 teaspoons baking powder
1 (24 ounce) package chocolate chips
    plus 1 (8 ounce) Hershey bar
3 cups chopped nuts

Cream butter and sugars; add eggs and vanilla extract. Combine dry ingredients and add to creamed mixture. Add chips and grated Hershey bar. Add chopped nuts. Drop by spoon onto cookie sheet about 2 inches apart. Bake at 375 degrees F for about 6 minutes.