Hi! I have been asked to make a red velvet cake for saturday...I planned on using the KAF recipe, the only issue is, the recipe calls for butter, not oil. I work in a bakery and one of my seasoned cake-baking colleagues told me oil is the way to go. Anyone have any suggestions about substituting or omitting butter for oil? Some? all? I'm just not sure! i want this cake to be moist and delicious. I even would be open to a new recipe if anyone has a tried and true one. Thank you!!