Yes it works, it really does and it tastes delicious! The other day my sister was telling me about this but I forgot to get the recipe from her. So today I was surfing around and found this. Granted I have never made peanut brittle the "old fashioned way" but my sister tells me that she will never stand in front of her stove stirring forever, using her cast iron frying pan, again. The only thing I did differently was spray the cookie sheet with Pam and use a rolling pin once I had it on the cookie sheet, it helped flatten it out a bit more. This takes about 15 minutes from start to finish not including cooling time. You can substitute any nut for the peanuts, even sunflower seeds.
Here's the results:
Put into little cellophane packages it will be a great addition to my Christmas baskets :)