Ok, so I made my IMBC icing a day ahead, refriderated it and brought it to room temp. Then, when I tried to re whip it, the whole thing separated It was a watery mess. What did I do wrong?
Thanks
Susan

Just keep whipping it. It'll come back together once all the ingredients warm up and reach the same temp. If you are in a hurry then you can heat the bowl with a torch or warm cloth. It will always seperate and look terrible when you first start re-beating it.

Also Italian Meringue Buttercream is fine sitting out overnight. It won't go bad that quickly.

You may have to beat it for quite awhile, and it will look awful, but it will come back.

I never EVER would leave IMBC sitting out, no matter what the recipes say it's good for at room temp. Too scary.

Yup, just keep beating. You can torch the bowl a little to warm it up.

I hope it worked and you didn't give up on it! You really do have to let it sit out for a good long time to make sure it's truly room temp. I often use my digital thermometer just to make sure, as I know it can be so heartbreaking to see it break. Don't forget, if it goes totally soupy on you (rather than curdly) then it's actually too WARM and chilling it a while will fix the problem. Don't ever throw out IMBC or we will have to whup you!

Whoops, nevermind, I forgot, that is a reason you are allowed to throw it out .

What method/recipe did you use to make the IMBC? I use Rose Levy Berenbaum (sp?)'s Moussline Buttercream, where you heat the syrup to 248, turn off the beater and pour in a bit of syrup, then whip 5 secs, then turn off and pour more in, then whip 5 secs, then pour the rest in. I am by no means an expert but for some reason this has always worked. (I hope I didn't just curse myself).

For what it's worth I have had to throw out SMBC twice because I cannot manage to keep the EW from scrambling. Chewy egg flecks, yuk!

Oooh Mousseline Buttercream is in the Cake Bible right? Love that book! I haven't tried it but will next time. I'm sure you haven't cursed yourself btw lol

The first time I made smbc it scrambled, so now I lightly beat the egg whites till just frothy before putting them over the heat - haven't had a problem since. Also make sure the bowl isn't touching the water underneath