My fondant bow on my present cake went droopy overnight. The fondant is so brittle that it keeps breaking if I try to move it. Can I make a decent bow out of buttercream? Client will be here in 2-1/2 hours!

If you have gumpaste,mix equal amounts with fondant & make another bow.

Make another bow, the best way to go. I'd use a bit more gumpaste than fondant, but do mix them together to make the bow less brittle.

I don't have gumpaste. I'm working on a new bow. How long does it take fondant to dry? It dried all day yesterday, but still drooped. Is it because I covered it last night?

Support the folds of the bow with balled up tin foil or wax paper or plastic wrap. Don't cover, you need the air to dry it. If you have a gas pilot in the oven open the door and set the bow inside (don't turn it on, just the pilot), that will help. I've never tried a bow with just fondant, so I don't know how long it needs to be able to support itself, and be considered dry.

if u add tylose or GP to the fondnat it will dry enough to hold its shape in a few hours. it needs to be open to air to dry

Yes, covering it was a bad idea. It will not be able to dry and may absorb moisture from the cake and icing. Add tylose or even just more PS if you have nothing else. You can also use melted chocolate for a really quick finish bow.

Wouldn't not covering it dry out the rest of the cake though? It must have absorbed the moisture from the cake, b/c the fondant was *definitely* dry when I made the bow.

Perhaps. If that is the case then you would need to place the bow a little bit before pickup.