1 c. butter
1 c. brown sugar, packed
1 egg
1 tsp. vanilla
2 c. flour
1/4 tsp. salt
1 1/2 c. chocolate chips (semi-sweet or milk chocolate)
1/2 c. nuts, chopped (optional)

Heat oven to 350 degrees. Grease baking pan, 13 x 9 x 2 inches in size. Mix thoroughly all ingredients. Press evenly in bottom of pan. Bake 25 to 30 minutes or until light golden brown. Remove from oven; sprinkle package of chocolate chips on the cookie crust. As soon as the chips soften, spread evenly to cover the crust. Sprinkle top with the chopped nuts (optional). While warm, cut into bars.