my homemade marshmallow fondant wont go to a light grey i am using black gel coloring and its turning into a dark purple if i add the white it just turns lighter black/purple any suggestions?
I find that cheep brands are not black but more purple as you said. Which one are you using? Or maybe it's expired or contaminated with another colour? I use wilton or americolor food colouring gel and never had issues...
I use americolor gel and always find it is more purple than black/grey too. It drives me nuts. Maybe you could try a paste colour or a powder colour.
I use Wilton black all the time for grey and it works great.
I use Americolor gel and it always goes purple. Add a couple drops of yellow; it counteracts purple.
Another option, probably not for tonight but I good thing to know about, is LECITHIN! I’m sure there are other threads about it, but basically, it’s an emulsifier and by adding the same amount of liquid lecithin as gel color or powder, you get much brighter, truer colored fondant (and can be used in buttercream too).
Sweetwise sells it and has a great video showing examples (I think there’s even one of grey/purple fondant without lecithin, and then with it) and lecithin's other uses (look in the comments box below video for info on how much to use)
I bought my lecithin from a health food store, but it can be a bit hard to find unless you order it online from Sweetwise. Just make sure you get the LIQUID (actually, it’s kind of a thick syrup consistency), NOT the GRANULAR or POWDER (both of which are much easier to find than the liquid, unfortunately).
Good luck, and thanks to everyone else who commented on the black Wilton versus Americolor,
Also remember that when you add white, it lightens. White will never make any color darker. Hope it works out!