I made up some basic icing for biscuits: icing sugar + water.

I have a lot leftover and was wondering whether there was a way to turn it into a buttercream icing? I wondered whether by adding more icing sugar to thicken it, and then adding butter that would work?

I'm hoping someone else has tried it and knows!


1 Answer 1


It will if you add more icing sugar but you may end up with a lot of buttercream depending on how much of the icing you have left. A basic ratio is 4 cups icing sugar to 1 cup of butter and 1/4 cup of liquid which makes 3 cups of icing. You may have to add more icing sugar, then more butter to compensate for the water if there's more than 1/4 cup in your original biscuit icing.

  • That makes sense! Will give it a go - thanks! :)
    – hlh3406
    Jul 28, 2015 at 8:19

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