Line a 9x13 bake dish with parchment paper.
Combine all of the ingredients ( except the walnuts) in a large pot, and place over medium heat.
Let the ingredients melt, and stir continuously.
Once the mixture is nice and smooth, turn the heat up to medium high.
Stir, and let the candy mixture get up to 240 F. ( not 260 F as stated in the video..).
Remove the candy mixture from the stovetop, add it the walnuts, and stir.
Pour the mixture into the parchment paper lined bake dish, and let cool.
Once completely cool, cut the fudge into desired shapes.