Coat a 8×12 pan (9×13 will be ok, too.) with butter and set next to towel.
Turn heat on to medium high and bring to boil. Notice how it looks like there is not much in pot. Stir CONSTANTLY.
It will start to really shine.
Every now and then do a water test. To do this, fill a glass with cold water and drop some fudge mixture into it.
When it reaches the softball stage remove from heat. Softball stage is when you can roll the drop into a soft ball.
Add vanilla extract and stir..it will bubble up some as it burns off the alcohol. Add butter and stir.
Now dip pot into water in sink for 4-5 seconds then place on towel and stir. Repeat several times.
Mixture will begin to thicken. Add nuts and stir.
Mixture will start to look a little dull..Hurry and pour into buttered pan. Sprinkle a little nuts on top if you want.
Let set up for 20 minutes then cut with a smooth bladed knife
Let cool completely before putting in a bag or tin. Otherwise it will sweat and not look so pretty… Enjoy !