Gluten-Free Key Lime Bars
Indulge in the vibrant tang of our Gluten-Free Key Lime Bars, where zesty key lime meets perfectly balanced sweetness in every bite. Enjoy this guilt-free dessert that combines tropical flavors with a wholesome, gluten-free twist for a truly refreshing treat.
Whether you’re baking for a family gathering or craving a lighter dessert for hot summer days, these gluten-free key lime pie bars will quickly become a favorite in your kitchen. If you’re looking for more inspiration for gluten-free desserts, I highly recommend checking out this vibrant cranberry curd tart for another delicious option!

As a chef and nutrition consultant, I’ve learned that these bright and zesty treats can perfectly fit into a gluten-free lifestyle without compromising on flavor or texture or using lots of sugar. Using simple ingredients like almond flour and coconut milk or gluten-free graham crakers or honey crakers creates a buttery, gluten-free shortbread crust that pairs beautifully with a tangy key lime filling. They’re a healthier twist on the traditional key lime pie recipe we all know and love.
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Why You’ll Love These Gluten-Free Key Lime Bars
With every bite, you’re met with the tangy pop of key lime juice balanced perfectly by a creamy filling and buttery gluten-free shortbread crust. They’re an ideal choice whether you’re hosting a party, looking for a spring or summery treat, or just needing a bright and zesty pick-me-up dessert. Let’s explore what makes them irresistibly good.
They’re Packed with Fresh, Tangy Lime Flavor
The star of the show here is undeniably the vibrant flavor of key lime juice. Traditional key lime pie recipes are famous for their tartness, and these bars embrace that spirit while adding a gluten-free twist. If you don’t have access to key limes, feel free to substitute with fresh lime juice from regular limes or even Persian limes without missing a beat.
Adding a little key lime zest to the filling amplifies the citrusy aroma, creating a multidimensional flavor experience that’s tangy, sharp, and completely refreshing.
A Buttery, Gluten-Free Shortbread Crust
Made with simple ingredients, this gluten-free crust achieves the perfect balance of buttery richness and crisp texture. It’s sturdy enough to hold the luscious filling together yet melts in your mouth with every bite. You can make this almond crust or use gluten-free graham crackers. It’s super easy!
Perfect Balance of Sweet and Tart
One thing that makes these key lime bars truly special is the harmony of flavors. The filling incorporates sweetened condensed milk, fresh lime juice, and coconut cream or condensed coconut cream for just the right amount of sweetness to offset the tangy lime notes. Want to mix it up? A splash of lemon juice will balance the flavor.
This creamy texture is what makes each bar so satisfying. It has that classic custard-like consistency found in a traditional key lime pie recipe, yet it feels lighter and brighter when served chilled.
Simple and Convenient to Make
These gluten-free key lime bars are as easy to prepare as they are to eat. They require just a few common ingredients that are easy to find, such as a food processor.
A Crowd-Pleasing Dessert
Quick to impress and even quicker to disappear from the dessert table, these bars are a crowd pleaser all the way. Whether your guests are gluten-free or not, the fusion of vibrant lime flavor with a smooth, creamy filling and buttery crust is universally loved.
For a little extra flair, top each bar with a dollop of homemade whipped cream or sprinkle some lime sugar on top for added zing. Picture serving these on a warm summer day, alongside something equally refreshing like this tangy and sweet lemon curd tart. It’s pure dessert bliss!
No matter the occasion, these gluten-free key lime bars will become one of your favorite desserts.

Ingredients for key Lime Pie Bars
For the Crust
- Gluten-Free Graham Cracker Crumbs: These are a classic choice for creating a crumbly, flavorful crust. You can find gluten-free and even grain-free graham crackers or honey crackers at most grocery stores or specialty health food stores.
- Erythritol or Coconut Sugar: Choose a natural sweetener like coconut sugar for an earthy sweetness or erythritol for a low-sugar alternative.
- Unsalted Butter or Vegan Butter: Melted butter gives the crust that delicious, cohesive texture. If dietary restrictions apply, go for vegan butter or even refined coconut oil for a slight coconut flavor twist.
For the Filling
- Sweetened Condensed Milk: This rich, creamy ingredient gives the filling its signature sweetness and silky texture.
- Egg Yolks: These provide structure and add to the creamy consistency of the filling. Let the egg yolks come to room temperature for the best results before mixing.
- Key Lime Juice: Fresh key lime juice is the best option for a vibrant, authentic flavor. If you can’t find key limes, substitute with fresh lime juice from regular limes or Persian limes . Either way, freshly squeezed juice ensures a tangy, fresh flavor.
- Key Lime Zest: Don’t skip this step! Zesting adds a concentrated lime aroma and enhances the citrusy notes of the filling.
Feeling inspired by all things lime and citrusy? Explore how acid affects flavor balance with this article.

Step-by-Step Instructions for Making Gluten-Free Key Lime Bars
Preparing the Crust
Combine the Ingredients: Put graham crackers in teh food processor and pulse it until it creates a flour-like consistency. Add sugar and melted butter if you feel like you need it.
Pulse it until evenly combined. Press the mixture firmly into the bottom of the prepared pan lined up with parchment paper. Bake for 8- 10 minutes until lightly golden. Let cool slightly on a cooling rack.
Preparing the Filling
- Mix the Ingredients: In a large bowl, whisk sweetened condensed milk, egg yolks (room temperature for easier mixing), and fresh key lime juice together. Add a pinch of key lime zest for an extra pop of citrusy flavor.
- Pour Over the Crust: Carefully pour the filling over the crust once the crust is cooled. Spread evenly with a spatula to cover every corner.
- Bake: Place the baking dish back in the oven at 350°F and bake for 15- 20 minutes until the filling is set but still slightly jiggly in the center. Allow it to cool on a wire rack before moving it to the fridge.
Chilling and Serving Tips
- Chill Thoroughly: Place the baked dessert into the fridge for at least 2 hours or overnight if you have time. Wrap it tightly with plastic wrap or aluminum foil to protect it from absorbing fridge odors.
- Cutting the Bars: Use a sharp knife and wipe it clean between cuts for neat squares. Let the bars chill a bit longer if the filling feels too soft.
- Creative Garnishing: Top your bars with a dollop of homemade whipped cream or a sprinkle of lime sugar. A few thin slices of lime or extra lime zest can add a fresh, colorful touch.

Ingredient Substitutions
Gluten-Free Alternatives for the Crust
- Gluten-Free Honey Crakers: Crush these into crumbs for a slightly sweeter crust. I used grain-free and gluten-free honey crackers from Simple Mills.
- Almond Crust
- Gluten-free pie crust
Dairy-Free and Vegan Substitutes
- Coconut Oil: Use in place of melted butter for the crust. It adds a slight coconut flavor that complements the tangy key lime filling.
- Coconut Cream: Works beautifully as a substitute for sour cream or cream cheese in the filling, giving it a luscious texture and mild sweetness.
- Coconut Condensed Milk: I use one from Let’s Do Organic or Nature’s Charm.
Citrus Varieties Beyond Key Limes
- Regular Limes: Fresh lime juice from Persian limes is an excellent stand-in and very accessible.
- Lemon Juice: Adds a slightly different tartness that still works well in these bars. A touch of lemon zest alongside lime juice can balance the flavor for something unique.
If you’re interested in exploring how citrus works in recipes, try reading this helpful guide on cooking with balance.
Adjusting Sweetness Levels
Everyone’s palate is different, so customizing the sweetness of the filling is always an option:
- Use coconut sugar or brown sugar for a deeper, more caramel-like sweetness.
- For a low-sugar version, swap regular sweetened condensed milk for a sugar-free variety. Then you can add erythritol like I did.
- Add a drizzle of maple syrup maple syrup into the filling for a hint of earthy sweetness.

Health Benefits of Key Lime Pie Bars
Crafting gluten-free key lime bars isn’t just about indulgence; it’s also an opportunity to incorporate ingredients that provide nutritional benefits. Each component can offer something valuable to your health, from zesty citrus to wholesome almond flour or seed crrust.
Key limes—or any fresh lime juice you choose—are celebrated for their high vitamin C content, which boosts your immune system and promotes glowing skin. These tiny citrus fruits also pack a punch of antioxidants that can help combat inflammation. Crust provides good protein and teh filling with healthy fats.
For more gluten-free baking inspiration, check out The Best Gluten-Free Buttermilk Mini Scones. These buttery treats are another crowd-pleaser perfect for summer gatherings and tea times!

Frequently Asked Questions About Gluten-Free Key Lime Bars
How Can I Achieve the Perfect Creamy Filling?
- Room Temperature Ingredients: Allow your egg yolks, sweetened condensed milk, and lime juice to come to room temperature before mixing.
- Proper Mixing: Combine the key lime filling with a hand mixer or food processor with a whisk attachment for the smoothest texture.
- Bake Gently: Bake the filling just until set—look for a slight jiggle in the center. Overbaking can affect the creamy texture.
How Should I Store Gluten-Free Key Lime Bars?
To keep your bars fresh:
- Wrap them tightly in platic wrap to prevent them from drying out.
- Store in an aitright container in the fridge for 3–5 days. This preserves the buttery shortbread crust and keeps the tangy filling vibrant.

Gluten-free key lime bars are a vibrant blend of tangy key lime filling and a buttery gluten-free shortbread crust that everyone can enjoy. With simple ingredients like almond flour, fresh lime juice, and sweetened condensed milk, these bars are as easy to make as they are delicious. Whether you’re baking for a sunny afternoon or just want a refreshing dessert, their creamy texture and perfect balance of sweet and tart flavors will not disappoint.
Try this easy recipe, and don’t forget to share your favorite toppings or creative twists! From a dollop of homemade whipped cream to a sprinkle of lime sugar, there’s no wrong way to serve these crowd-pleasers. They might become one of your favorite desserts for friends and family!

Healthy Baking Recipes
White Chocolate Christmas Tart
Gingerbread Chocolate Ganache Tart
Tangy and Sweet Lemon Curd Tart
Cranberry White Chocolate Tart

Gluten-Free Key Lime Bars
Equipment
- Baking dish 8×8
Ingredients
Crust
- 1 1/2 cup Honey crackers or Graham crackers from Simple Mills
- 1/8 cup Erythritol or coconut sugar if needed
- 6 tbsp Butter unsalted and melted
Filling
- 28 oz Coconut unsweetened condensed milk or unsweetened condensed milk
- 6 Egg yolks large
- 1/2 cup Erythritol
- 1 cup Key lime juice (fresh or bottled)
- 1 tsp Lime zest
Instructions
- Preparing the CrustCombine the Ingredients: Put graham crackers in the food processor and pulse it until it creates a flour-like consistency. Add sugar and melted butter if you feel like you need it.Pulse it until evenly combined. Press the mixture firmly into the bottom of the prepared pan. Bake for 8- 10 minutes until lightly golden. Let cool slightly on a cooling rack.Preparing the FillingMix the Ingredients: In a large bowl, whisk sweetened condensed milk, egg yolks (room temperature for easier mixing), and fresh key lime juice together. Add a pinch of key lime zest for an extra pop of citrusy flavor.Pour Over the Crust: Carefully pour the filling over the crust once the crust is cooled. Spread evenly with a spatula to cover every corner.Bake for Perfection: Place the baking dish back in the oven at 350°F and bake for about 15- 20 minutes until the filling is set but still slightly jiggly in the center. Allow it to cool on a wire rack before moving it to the fridge. Chilling and Serving TipsChill Thoroughly: Place the baked dessert into the fridge for at least 2 hours or overnight if you have time. Wrap it tightly with plastic wrap or aluminum foil to protect it from absorbing fridge odors.Cutting the Bars: Use a sharp knife and wipe it clean between cuts for neat squares. Let the bars chill a bit longer if the filling feels too soft.Creative Garnishing: Top your bars with a dollop of homemade whipped cream or a sprinkle of lime sugar. A few thin slices of lime or extra lime zest can add a fresh, colorful touch.
Notes
Nutrition
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