No matter what I do, I always have air bubbles in my fondant when rolling it out. I've tried microwaving it to soften and it happens. I don't nuke it and it happens. Am I kneading it too much? kneading it wrong? (is that possible?)
Cake drums look awful when I put the fondant on.

Any tips for a really smooth fondant? BTW, I make my own, MMF and MFF

Thanks.

Air bubbles on the cake or when rolling?

Sometimes when kneading you knead air into your fondant. Stick with pin, push out, and smooth.

On a cake they are caused by air escaping during the settling process. To fix, poke with pin, push out and release. Pushing the pin in at a diagnal makes it easier to cover the hole. To avoid this, allow cake time to settle so all air escapes prior to fondant-ing.

HTH!

Kneading with too much "folding" will cause the air bubbles. Try not to fold the fondant onto itself while kneading. It's a bit tricky, but it does help.

How do you knead without folding? I push the fondant out with the heel of my hand and pull it back with my fingers- is that the kind of folding you're talking about?

Here's how I knead without folding... Push out with the heel of hand. Stand stretched fondant up on it's side. Push down. Turn. Repeat. It doesn't prevent bubbles 100%, but it keeps them to a minimum.

Yes, it's the air while rolling out the fondant. I was folding it on itself. It's the only way I have done it. (like bread dough) I will try to not fold it so much. I have used a pin to 'pop' them, but there are so many small bubbles and it does leave holes that I can't seem to cover so well.
Thanks for the tips on kneading. I will definitely try them.

Covering a too cold cake can cause them too.

Bubbles happen to us all...pop those suckers and keep making those beautiful cakes!

I think I need to see a video on how to knead without bubbles, I have the same problem too. Interestingly, I only have the problem with fondant which has candy clay mixed in. Plain fondant doesn't cause bubbles for me.

I also knead my mmf like bread, and I have never had this issue. Curious. What is your recipe for MMF. Could it be something your adding that I am not? I use only marshmallows, water, flavoring, and powdered sugar. Oh, and I never use cornstarch. Only small amounts of shortening to roll out or knead.

I would love a video too!
Those are the ingredients I use for MMF. I never use cornstarch either. I've tried to figure it out, but just haven't!