How stiff does the icing for an FBCT need to be? I've read over the tutorial, but I had some icing I just wanted to make stiffer and try it with instead of making a whole new batch.
Also, any tips on making black? Does it give a bad taste to the whole thing? I know a lot of people that avoid red & black icing b/c it always has so much coloring in it that they think it gives it a bad taste...... and it turns your teeth red or black!!! NOT pretty!!! 
Anyway, looking forward to trying this technique out! I appreciate all your tips & help!
To outline, I have a stiffer consistancy, probably like medium or a little more. To fill in the image, my icing is somewhat thin. Especially if there are small areas you need the icing to get into. You want the icing to fill in the area, and not sit on top of the outline...if that makes any sense. I find thinner is easier to fill and cover with .
I did a FBCT for the first time this weekend. I was very happy with the results.. I just went did what I thought I should do and it came out right.. The icing was I guess a thin to med consistency. As far as black. Take a look at my pic below. I just used the wilton black and mixed it up with white and it looked great and didn't taste bad at all. Also the longer you let the color sit the darker it gets.. So if you think it isn't dark enough, give it time and it will darken.
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