I'm no baking wizard but I think you kinda gotta have that butter. :-)
Go get the butter something's can't be left out x
Nooo! Need butter.
One thing I'm good at is baking.
I have a feeling your topping will be too greasy with Crisco .. but it might be OK.
the only choice is margine if you have it
How about OIL? I can boil water on a good day., so i admire what yer doin.