1 c. butter
1 1/2 tsp. vanilla
2 c. sugar
4 eggs, add 1 at a time

Mix together above ingredients, then add 2 cups flour, 1/2 teaspoon salt and 2 cups nuts (optional). Put half of dough in 13 x 9 inch pan. Add 2 ounces melted chocolate to remaining batter, and drop from spoon on white batter. Run knife through batter to marblize. Bake at 350 degrees for 45 minutes. Leave in pan until cold.