Gluten-Free Key Lime Bars
Why This Recipe Works
We wanted to bring all the essence of Key lime pie to a Key lime bar, creating a bar that balanced a tart and creamy topping and a buttery rich base. For the base, we wanted something similar to shortbread: a crisp, buttery crust that could support the topping yet slice neatly and easily. We started with a classic shortbread recipe by mixing pieces of softened butter into our all-purpose gluten-free flour blend, along with sugar and salt, using a stand mixer to ensure a fine crumb. The flavor was exactly what we wanted, but without gluten this base couldn’t support the topping. Adding just 1/4 teaspoon of xanthan gum gave the crust the structure it needed to hold up and slice neatly without crumbling. As for the filling, it also had to be sturdy and sliceable. By adding cream cheese and an egg yolk to the usual sweetened condensed milk and lime juice and zest, we created a rich and firm filling.