How do I mix colors in the completed icing without getting air bubbles back in it? I need several colors out of this one batch, so I took some of it out and put a color in it and then beat it with a hand mixer to mix the color, but now it has air bubbles back in it. I never get even coloring if I mix colors by hand, so does anyone have any suggestions on coloring this icing without ruining the velvety smooth texture?
I went ahead and hand mixed it with my small spatula and it worked great. Sharon's recipe seems to take the color more evenly than other BC recipes I've tried. Maybe because it's so smooth to begin with. Whenever I've tried coloring by mixing by hand with other recipes, I've always had streaky coloring once the cake was iced, so I was scared to do this with Sharon's recipe for fear of the same thing happening, but it came out very evenly colored and no air bubbles this time. 
Thanks for the tips!
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