3 (6 oz. each) pkg. semi-sweet chocolate chips
1 can Eagle Brand sweetened condensed milk (NOT evaporated milk)
1 1/2 tsp. vanilla
Pinch of salt
1/2 c. chopped nuts (optional)

Melt chips over hot water. Remove from heat and add milk, etc. Stir until smooth. Butter an 8 inch dish. Chill and cut.