I ended up finding a Lemon Crackle cookie recipe in my Company's Coming cookbook. It's a basic recipe and I just switched out all the lemon ingredients for lime. I also added in some chocolate chips. They turned out pretty good but the lime flavour isn't super strong.
Don't get me wrong, they're very tasty with a harder outside and a soft inside. But I think we were both expecting a stronger lime taste. So now I need to get down to the U.S. to look for key lime cake mix!
I hope you're having a wonderful weekend and enjoying some sweet treats too!