Line an 8x8 inch pan with parchment or wax paper.
In a large saucepan combine marshmallow cream, sugar, evaporated milk, butter and salt.
Bring to a boil stirring constantly for 5-10 minutes.
Remove from heat and pour in semisweet chocolate chips and milk chocolate chips.
Stir until chocolate is melted and smooth and add vanilla.
Fold in nuts.
Pour into lined pan.
Chill in refrigerator for 2 hours till firm.
Cut into squares to package and gift or enjoy yourself!