Key Lime Pie Bars are the perfect combination of sweet, tangy, and creamy — all layered over a buttery graham cracker crust. These refreshing citrusy bars are an easy and elegant dessert option that’s perfect for summer get-togethers, potlucks, or anytime you need a burst of sunshine in dessert form.

Why You’ll Love This Recipe

These bars are everything you love about key lime pie, simplified into easy-to-slice squares. The graham cracker crust adds a lovely crunch and warmth, while the filling is rich with sweetened condensed milk, brightened by the fresh zing of lime juice and zest. They’re easy to make, require minimal ingredients, and are chilled to perfection — ideal for a refreshing treat on warm days or after a hearty meal.

Ingredients

1 cup graham cracker crumbs
1/4 cup sugar
1/4 cup unsalted butter, melted
2 cups sweetened condensed milk
1/2 cup fresh lime juice
1 tbsp lime zest
2 large eggs

(Tip: You’ll find the full list of ingredients and measurements in the recipe card below.)

Directions

Preheat your oven to 350°F (175°C) and grease an 8×8-inch or 9×9-inch baking dish.
In a bowl, combine the graham cracker crumbs, sugar, and melted butter. Mix until well combined, then press the mixture firmly into the bottom of the prepared dish to form the crust.
In another bowl, whisk together the sweetened condensed milk, lime juice, lime zest, and eggs until smooth and fully combined.
Pour the lime mixture over the prepared crust and spread it evenly.
Bake for 15-20 minutes, or until the center is just set and no longer jiggles when shaken gently.
Let the bars cool at room temperature, then refrigerate for at least 2 hours before slicing and serving.

Servings and Timing

Prep Time: 10 minutes
Cooking Time: 15-20 minutes
Total Time: 2 hours 30 minutes (including chilling time)
Servings: 16 bars

Variations

Coconut Twist: Add 1/4 cup shredded coconut to the crust for a tropical spin.
Gluten-Free: Use gluten-free graham crackers for a celiac-friendly version.
Creamier Texture: Mix in a couple tablespoons of sour cream or Greek yogurt into the filling for a silkier finish.
Topping Option: Add a dollop of whipped cream or a dusting of powdered sugar on top before serving.

Storage/Reheating

Storage: Store the bars in an airtight container in the refrigerator for up to 5 days.
Freezing: You can freeze these bars for up to 2 months. Wrap them tightly in plastic wrap and foil before freezing. Thaw in the fridge before serving.
Reheating: These are best served chilled and do not require reheating.

FAQs

1. Can I use bottled lime juice instead of fresh?

Yes, you can use bottled lime juice in a pinch, but fresh lime juice and zest will provide the best flavor and brightness.

2. What kind of limes are best for this recipe?

Key limes are traditional, but regular Persian limes work just as well and are often easier to find.

3. Can I use a different crust?

Absolutely! You can use a vanilla wafer crust, shortbread, or even a gingersnap crust for a unique flavor twist.

4. Do I need to use sweetened condensed milk?

Yes, sweetened condensed milk is essential for the creamy, sweet texture and structure of the filling.

5. How do I know when the bars are done baking?

The filling should be set around the edges and just slightly jiggly in the center — it will continue to set as it cools.

6. Can I make these bars dairy-free?

To make these bars dairy-free, use a plant-based condensed milk and vegan butter substitute for the crust.

7. Can I make them in advance?

Yes, these bars are perfect for making ahead since they need to chill for a few hours before serving.

8. Can I double the recipe?

Yes, you can double the ingredients and bake them in a 9×13-inch pan. Adjust the baking time slightly, adding a few minutes if needed.

9. What should I serve with these bars?

They’re great on their own, but a side of whipped cream, a lime wedge, or fresh berries makes a lovely presentation.

10. Can I make these bars without eggs?

Yes, you can omit the eggs, though the texture will be softer and more like a no-bake version. You may need to increase the chilling time to ensure they firm up properly.

Conclusion

Key Lime Pie Bars are a bright, tangy, and refreshing dessert that delivers big flavor with minimal effort. With a buttery graham cracker crust and a creamy citrus filling, these bars are perfect for summer or whenever you want a dessert that’s light, sweet, and satisfying. Easy to make and even easier to enjoy — they’re sure to become a favorite in your dessert rotation!

Key Lime Pie Bars

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Print Recipe

Key Lime Pie Bars are a refreshing, citrusy dessert with a buttery graham cracker crust and a creamy lime filling. Perfectly tangy and sweet, these bars are easy to make and ideal for summer gatherings, potlucks, or anytime you need a burst of sunshine. No-bake, simple ingredients, and chilled to perfection, they’re sure to be a hit!

Total Time: 2 hours 30 minutes (including chilling time)
Yield: 16 bars

Ingredients

1 cup graham cracker crumbs

1/4 cup sugar

1/4 cup unsalted butter, melted

2 cups sweetened condensed milk

1/2 cup fresh lime juice

1 tbsp lime zest

2 large eggs

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Instructions

Preheat your oven to 350°F (175°C) and grease an 8×8-inch or 9×9-inch baking dish.
In a bowl, combine graham cracker crumbs, sugar, and melted butter. Mix until well combined, then press firmly into the bottom of the prepared dish to form the crust.
In another bowl, whisk together sweetened condensed milk, lime juice, lime zest, and eggs until smooth and fully combined.
Pour the lime mixture over the prepared crust and spread evenly.
Bake for 15-20 minutes, or until the center is set and no longer jiggles when gently shaken.
Let the bars cool at room temperature, then refrigerate for at least 2 hours before slicing and serving.

Notes

Coconut Twist: Add 1/4 cup shredded coconut to the crust for a tropical flavor.
Gluten-Free: Use gluten-free graham crackers for a gluten-free option.
Creamier Texture: Add 2 tablespoons of sour cream or Greek yogurt for a silkier filling.
Topping: Garnish with whipped cream or a dusting of powdered sugar before serving.

Author: Sophia
Prep Time: 10 minutes
Cook Time: 15-20 minutes
Category: Desserts, Bars, No-Bake
Method: Baking
Cuisine: American, Citrus-inspired
Diet: Gluten Free