Rice Crispy Ice Cream Dessert

Melt and stir (until dissolved)
1 C. brown sugar
1 cube butter

1 C. coconut
1/2 - 1 C. broken nuts (I like walnuts)
2 C. Rice Crispies

Press 1/2 of mixture into 9x13 pan.
On top, spoon 1/2 gallon vanilla ice cream (I get the kind in the box, cut off the box, and cut the ice cream into slices that I can place on top of the rice crispy mixture.)
Press the remaining 1/2 of rice crispy mixture on top of the ice cream. Freeze for at least one hour and serve with this Hot Fudge Sauce.