Never Fail Fudge

3 cups (1 1/2 12 oz. bags) semi-sweet chocolate chips (I usually use milk chocolate)
1 14 oz. can sweetened condensed milk
Dash salt
1 c. chopped pecans or walnuts
1 1/2 t. vanilla

Melt chips with sweetened condensed milk and salt. (microwave or heavy saucepan)
After melted, stir in vanilla and nuts. Spread evenly into wax paper-lined 8 or 9 inch square pan. Chill 2 hours or until firm. Turn fudge onto cutting board; peel off paper and cut into squares. Store loosely covered at room temperature