I bought the liquid kind of pasteurized whites called "All Whites". In container like Egg Beaters. I wanted to use it to make R.I. for cookies today. It says, however, on the containter that it cannot be used for merengues and will not whip up. The Martha Stewart recipe I was going to try says to whip the whites stiff first then add xxx sugar and lemon juice and beat another minute. Will it work?
Also how long will they last after they are opened?
Thanks so much!!! 
I have used them and they worked fine. The only thing I found was that they were perishable like using real egg whites (well, they are real but they are pasturized). What I mean is that if you use the merangue (spelling) powder you can leave out your royal icing. I found that you can only keep the ri used with the all whites for only a few days. It went bad on me and I could smell it. The carton was fine but what I had mixed up as royal went bad. Just my experience. I am trying to figure out if they are more cost effective than getting the merangue powder with my 40% off coupon at Michaels. Guess I'll have to do some math and figure it out.
I used it to make the R.I. I would not say they whipped up like stiff peaks. More like soft foamy. It worked ok for the icing even though Martha Stewart said whip egg whites to stiff peaks first... I don't see how it would work on a merengue icing though... Eliz W? I got the "All Whites" liquid that comes in container like Egg Beaters. I was going to make some merengue icing this weekend and it would be great to use it up but not sure it would whip enough.... Anyone? Eliz?
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