Created by Fizzybrat on September 13, 2017
Step 1: Line an 8x8-in. pan with foil; grease foil.
Step 2: In a large heavy saucepan, combine butter, granulated and brown sugars, cream and salt. Bring to a rapid boil over medium heat, stirring constantly.
Step 3: Cook, without stirring, until a candy thermometer reads 234° (soft-ball stage).
Step 4: Remove from heat. Add vanilla to pan (do not stir).
Step 5: Cool, without stirring, to 110°, about 30 minutes.
Step 6: Beat with a spoon until fudge just begins to thicken. Gradually stir in confectioners' sugar until smooth; add nuts and continue stirring until fudge becomes very thick and just begins to lose its sheen.
Step 7: Immediately spread into prepared pan. Cool.
Step 8: Using foil, lift fudge out of pan.
Step 9: Remove foil; cut fudge into 1-in. squares.