|curdled and sad|
Using Italian meringue as the example, it will curdle if the butter is too cold when you add it. It looks like cottage cheese, and you might think that you ruined it. But don't despair, just beat it on high while you wrap a hot dishtowel around the mixer bowl. Eventually it will warm up and emulsify into a beautiful fluffy icing once again.
|The same icing after whipping it.|
And now, enjoy the best video ever made while you wait for your meringue to whip up. I think the lady in it is actually making a meringue, so it's appropriate.