Chocolate Peanut Butter Fudge

4 1/2 cups sugar
1/4 pound butter
1 can (12 oz.) evaporated milk
1 dash salt
12 ounces chocolate chips
7 ounces marshmallow cream
1/2 cup peanut butter
1 teaspoon vanilla

Bring to a boil: sugar, butter, evaporated milk and salt. Boil 15 minutes. Remove from heat. Add chocolate chips, marshmallow creme, peanut butter and vanilla. Beat until thick. Pour into 13 x 9 inch pan. Refrigerate.