Gluten-Free Key Lime Squares (Dairy-Free)

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Average Rating: 4.5 | Rated By: 10 users

These are the best gluten-free Key Lime Squares by far – the crust is mildly spiced with ginger and nutmeg. The key lime custard topping has a light texture, almost like a mousse. Hinted with key lime juice and sweetened with only condensed coconut milk, keeping the key lime squares light and dairy-free.

I love chilled desserts! Especially after having a heavy meal, the last thing you want to add is a rich dessert. Besides, chilled desserts are refreshing, satisfying and often replace ice cream during warmer weather.


key limes on a branch


What is key lime?

The Key lime is a citrus species with an oval fruit. Typically key lime is picked when green, but it turns to a yellow colour when ripened. This fruit is grown in the United States, Mexico, South America and Central America. It is more pungent than Persian lime, and it is smaller and more acidic.

key lime dessert the details…

I wanted to keep this key lime recipe easy enough for even novice cooks to master. To start, I took a traditional key lime pie recipe and converted it to a gluten-free and dairy-free key lime cake. I baked the key lime dessert in a square pan so that it can be cut into squares.

Why is this gluten-free crust so good?

The crust is partially made with almond flour, keeping it buttery and moist. I added ginger and nutmeg for flavour and because both spices go well with key lime.

the dairy-free custard…

I kept the key lime custard light and refreshing, almost like a mousse texture. Using condensed coconut milk, the custard is dairy-free, and I did not have to add extra sugar. The only flavour in the gluten-free dessert topping is key lime.

The key lime makes this sweat treat taste incredibly fresh. However, if you can’t get key limes, you can combine fresh lime juice with lemon juice to get the same results.


key lime squares, gluten free


start with baking the gluten-free crust first…

The crust is partially baked before the custard topping is added. This keeps the crust firm and buttery, not soggy. Once the crust is partially baked, add the topping and bake it few more minutes. Just long enough so that the dairy-free custard is no longer jiggly.

Next, the cake is chilled overnight. By cooling the cake overnight, the custard will set to perfection.

This dessert is a no-fail recipe, it is super easy to make and tastes so good!! I like to serve the squares with fresh key lime zest, but if you want to go all out, serve it with whipped cream. Trust me on this, these gluten-free key lime squares don’t get any more delicious than this! Enjoy.


  • 2/3 cup almond flour
  • 2/3 cup gluten-free flour blend (I used better batter)
  • 2 Tbsp. Sweetener, I used coconut sugar
  • 1/2 tsp. GF ground ginger
  • 1/4 tsp. GF ground nutmeg
  • 3 Tbsp. coconut oil, melted and slightly cooled
  • 1 Tbsp. water
  • 3 large eggs, separated
  • 1 large egg
  • 1/3 cup fresh key lime juice, (if you don't have key limes, you may substitute the key lime juice with a mixture of fresh lemon juice and fresh lime juice in equal parts)
  • 1 Tbsp. key lime or lime and lemon zest
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  • Preheat the oven to 350 F and line a 9 x 9-inch baking pan with parchment paper
  • Prepare the crust. In a medium mixing bowl, stir together all the dry ingredients, then stir in the coconut oil and water. Mix until thoroughly combined. Press the mixture evenly over the bottom of the pan and bake for 10 minutes Remove from the oven and cool completely while preparing the filling.
  • Using an electric hand mixer or a stand mixer whisk 3 egg yolks with 1 egg until smooth. Beat in condensed coconut milk, then the key lime juice and zest until thick and smooth. Set aside
  • In a large bowl, beat the egg whites until firm peaks form. Fold one third of the egg whites at a time into the custard. Pour custard into the baking pan and bake for 15 minutes until no longer jiggly. Cool completely and then refrigerate overnight
  • Leave a Comment

    5 Responses to Gluten-Free Key Lime Squares (Dairy-Free)

    • Sophia November 24, 2018

      best gluten-free dessert I have ever made and super easy too, thank you!!!!!

    • Nancy March 10, 2021

      This is amazing. We like keylime pie. These keylime squares are next level fabulous! I’ve already shared this recipe.

      • Kristina March 10, 2021

        thank you Nancy, always nice to hear!

    • Rhonda April 4, 2021

      Absolutely delicious, and so easy to make. Thank you for this recipe 🙂

      • Kristina April 4, 2021

        thank you Rhonda.

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