1 1/2 sticks butter, melted
2 c. brown sugar
2 c. flour
2 tsp. vanilla
3 eggs
1/2 c. crushed nuts (optional)
Chocolate chips

Mix together butter, brown sugar, flour, vanilla, eggs, and nuts. Sprinkle with chocolate chips. Pour into a 9 x 13 inch greased pan. Bake at 350 degrees for 20-25 minutes.