Chunky Chocolate Peanut Butter Fudge

1 cup peanut butter
1 small can (or 2/3 cup) evaporated milk
1/4 cup butter
1 1/2 cup sugar
1/4 teaspoon salt
1 12 oz package semi-sweet chocolate chips
1 teaspoon vanilla extract
1/2 cup chopped nuts* (optional)

Mix peanut butter, butter, sugar, milk and the salt in a large sauce pan. Cook and stir until mixture comes to a full boil. Stirring constantly, boil for 5 minutes over medium heat. Remove from heat, add chocolate chips and stir until chips are melted. Add vanilla and nuts, stirring until blended. Pour into a buttered 9 in square baking dish. Chill and cut into squares.

* or use chunky peanut butter