I can't find it...so here it goes...WHAT DOES VODKA HAVE TO DO WITH FOOD COLORING???!!! I have seen a lot of cake decorators on here refer to mixing alcohol with the food coloring. I do it cause that's what it says to do 
however, I don't know why 
Anybody?
Well here's my take on it:
Mixing Food Coloring with Vodka takes it from a concentrated gel to a liquid form. Alcohol dries pretty fast and once it's dried it leaves no taste behind...and the alcohol evaporates away. You could also use extracts (they have about 80% alcohol).
if you are just adding colour to icing, then you dont need the vodka.
vodka (or any alcohol) is just for painting on dusts, or thinning out gel colours to paint with. you use alcohol as it dries so quickly, it doesnt affect the surface you paint on, where as water might start making it mushy, and just take a long time to dry. also, water doesnt mix properly with the dusts.
xx
Oh my! I'm surprised no one caught on to the rubbing alcohol part! No no no rubbing alcohol...vodka, gin, CLEAR DRINKABLE ALCOHOLS ONLY 
You wouldn't want to make someone sick. Well, maybe sometimes you would but... 
Good luck! 
Ahhhh Haaaa. Thank you! I guess that explains why when I was using one of the dusts (still new at this and not sure what it is exactly. I know it's not petal dust) didn't turn out so well. I was using water and got SOOOO frustrated I about threw out the topper I was working on.
You guys on here are just AWESOME!!!!! Thanks again!!
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