I foolishly made the mistake of sending someone to the store for me because I ran out of butter... Well, they came back with vegetable oil spread. (Mind you, I have recently discovered the wonderful Plugra butter, which makes such a fantastic difference in my baking!) I know I cannot use this veg oil spread in my cakes, but can I get away with using it in my buttercream? (I usually just do an american butter cream, with all butter - no shortening...)

Don't count on it crusting properly. It has a lot more water than butter. It doesn't harden up the same as butter either.

Better to just set it aside for your next chocolate cake.  Or send the person back with the slip to exchange it for butter.

So it will work well in a chocolate cake? I just found my new go-to chocolate recipe. I am sort of afraid to change anything in it. It is THAT good!! Lol
 

It will work absolutely guaranteed for a banana cake.

It will work for a chocolate cake.  It might make your go-to even better.

I will have to try it on both! Thank you so much!
 

AOh gross! I do put margarine on my potatoes and toast, but for baking, it's butter all the way!