I am doing my first zebra stripe cake and my question is, once I apply the strips how do I get the cornstarch off the stripes. I was thinking of using vodka but I don't want it to leave a taste.
I would use a good vodka (I use Grey Goose). To me, since the stripes already have a lot of coloring (you're doing them black, I assume), a little bit of good vodka doesn't really add to the bitter flavor they already have and it dries so fast! You can usually buy 2 ounce bottles of Grey Goose behind the counter of liquor stores. I've been using one for months and it's still over half full.
The vodka should evaporate and not leave a taste. You can also rub a little shortening on the fondant to remove the cornstarch.