1 c. butter
1/2 c. sugar
2/3 c. packed brown sugar
2 lg. eggs
1 tsp. vanilla
2 c. plus 4 tbsp. flour
1 tsp. salt
1 tsp. baking soda
2 tsp. cream of tartar
2 c. semi-sweet chocolate chips
1 c. coarsely chopped nuts

Preheat oven to 350 degrees. Beat butter and sugars in a large mixing bowl until light and fluffy. Add the eggs and vanilla. Mix well.

Mix the flour, salt, baking soda and cream of tartar in another bowl. Add the dry ingredients to the batter and mix until well blended. Stir in the chocolate chips and walnuts. Spread dough into a 15 1/2 inch pizza pan. Bake for 20 minutes. When cool, may be decorated.