1Combine first 3 ingredients into a crumbly mixture and press into the bottom of a sprayed 9x13 pan. (Metal works best)
Bake for 15 minutes and remove from oven.
Don't turn off the oven!
2Distribute the marshmallows over the top and return to the oven until they are nicely puffed.
Remove from oven. Turn off oven. :-)
3Meanwhile in a medium saucepan melt the 1/4c butter, add the butterscotch morsels and corn syrup and over me.-low stir until morsels are melted. Add the vanilla. stir.
Stir in rice crispies and nuts. Plop this mixture to the best of your ability all over the puffed marshmallows.
4Now place the pan in the refrigerator! A metal pan cools off faster than glass.
It needs to cool down, so you can cut them, but not so cold that they wont cut. :-0 ( It took about 35 minutes for me.
Now cut them into bars. If they keep running together , put them back in the fridge.it helps to dip your knife into hot water when cutting.