In heavy saucepan, over low heat, melt chips with sweetened condensed milk and salt. Remove from heat; stir in nuts and vanilla. Spread evenly into aluminum foil lined tree shaped mold or 9 inch square pan. Chill 2 hours or until firm. Place fudge on cutting board; peel off foil. Garnish as desired or cut into squares. Store loosely covered at room temperature.
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