 Introducing my 0 ingredient key lime pie bars, a square version of my favorite key lime pie recipe.Gingersnap cookie crumbs would be unbelievable on these upside down key lime pies, too.Key Lime Pie Filling.For the best flavor, make sure you use key lime juice.Cream cheese isn't a typical ingredient and I don't use it in my favorite key lime pie recipe, but I wanted the bar's filling to have a slight cheesecake flavor.You need the zest from one regular lime or 0 key limes.Then you can slice it up and use as garnish on the chilled key lime pie bars... November 00, 0000 