I wanted to try a new recipe for buttercream and decided to try Easy, Never Fail Buttercream by shelleytc10. The recipe calls for Meringue powder. I went to 3 different grocery stores with no luck in finding any. I did find a product called Just Whites. It is 100% dried egg whites. Can I use the Just Whites instead? Anyone know what effect the substitution will have on the recipe? Thanks!

Meringue powder is at craft stores in the baking isle and at Walmart in the baking area of the craft section. I can't answer you on the substitution.

Thanks scp1127! I never thought to go to Michaels or look in the craft section of Wal-Mart. Maybe I'll just return the Just Whites and buy the real meringue powder.

Meringue powder contains the following and in this order:
cornstarch
egg whites
sugar
gum arabic
calcium sulfate
citric acid
cream of tartar
silicon dioxide
artificial flavour

So depending upon what you are using it for, not hard flowers etc. you can probably google an exchange.
Also, meringue powder can be substituted for egg whites as follows:

2 tsp. meringue powder+2 tbsp water=1 egg white

So I am sure the reverse would work well in making a more crusting buttercream etc.

I would google it. You might not require all those chemicals.

Thanks for the info Chiara