Combine the first set of ingredients in a saucepan on medium low heat, stirring every 3-5 minutes, except for the last 5-10 minutes, you’ll want to stir fairly constantly. Use a wooden spoon or silicone spatula for stirring.
The candy has to reach 300 degrees to be at “hard crack” candy stage. (A candy thermometer is helpful for those that haven’t made it before.) This usually takes about 30-40 minutes when I make it.
Once the candy has reached 300 degrees, mix in ¼ c. chopped nuts and remove from heat.
Pour into greased cookie sheet (be sure to protect your countertops!).
Lay pieces of Hershey’s bar on top. Spread the chocolate with a metal spoon as it melts to make a top layer.
Sprinkle remaining nuts on top.
Let cool until hardened, and then crack into pieces. I prefer to store it in a covered holiday container in the refrigerator with waxed paper between layers.