BUT, what if you do have oil?! Can you use that instead without affecting your finished baked good?
One of our studio audience members named Patty had that exact question -- so we called on our friend, “Cake Boss” Buddy Valastro, to answer it!
Q: Can you substitute oil for butter? - Patty
A: Depending on the recipe, you can in a pinch, but I think butter is better. If you have a recipe, make it with both. Give it a shot [and] see which one you like better. Both of them will work. They’re both a fat, so you can substitute one for the other. -- Buddy Valastro
Now, with that said, the “Ace of Cakes” Duff Goldman feels quite strongly that oil -- not butter -- does the trick when it comes to making a cake super moist.
Moral of the story?
Baking may be a science -- but when it comes to the butter versus oil debate, to each baker their own!