Easy Homemade Toffee is the ultimate holiday treat and reminds me of my mom, who used to make this every year. Only eight ingredients, a little finesse, and some patience is all it takes!
Prepare a baking sheet with parchment paper. Set aside.
Melt the butter in a medium pan. Add the sugar, syrup, water and salt and turn heat to medium high. Bring to a boil, stirring constantly, and then continue cooking over medium high heat until it becomes an almond color and the candy thermometer reaches 305 degrees. This process should take approximately 15 - 20 minutes. Be careful, because it is VERY easy to burn.
Pour mixture in prepared baking sheet, and even it out with a spoon.
Lay four large Hershey's candy bars on top. Wait a minute and then as the chocolate melts, spread it around evenly with a spoon. Top with some additional nuts (any kind you like or none at all) and a sprinkle of kosher salt.
Place in freezer for approximately 45 minutes.
Remove from freezer and break the toffee apart with your hands. Store in airtight container.