If you're a fan of sweet and tangy desserts that can impress any crowd, then you’re going to love these Easy Key Lime Pie Bars. This delightful dessert combines a buttery graham cracker crust with a smooth, tart key lime filling that's guaranteed to leave your taste buds begging for more. Plus, it’s an easy recipe that anyone can whip up without much hassle. Keep reading to discover how you can create these refreshing and zesty bars, perfect for any occasion. Let’s dive into the ingredients, step-by-step instructions, and some pro tips that will ensure your Key Lime Pie Bars turn out perfectly every time!

What are Key Lime Pie Bars?
Key Lime Pie Bars are a bar dessert inspired by the classic Key Lime Pie. They typically feature a graham cracker crust topped with a rich and creamy key lime filling. Unlike traditional Key Lime Pie, these bars are cut into square or rectangular pieces, making them a portable and easy-to-serve treat. The tartness of the key lime filling contrasts beautifully with the sweet crust, creating a refreshing and irresistible dessert that's especially popular in warmer weather.
Ingredients List for Key Lime Pie Bars
Before you start, gather the following ingredients to create these scrumptious Key Lime Pie Bars:
For the Crust:
- 1 ½ cups of graham cracker crumbs (about 10-12 full sheets of graham crackers)
- ⅓ cup of granulated sugar
- ½ cup (1 stick) unsalted butter, melted
- Pinch of salt
For the Key Lime Filling:
- 4 large egg yolks
- 1 can (14 oz) sweetened condensed milk
- ½ cup fresh key lime juice (about 15-20 key limes)
- 1 tablespoon key lime zest (optional for extra flavor)
- ½ teaspoon vanilla extract
For the Topping:
- Whipped cream (optional, but highly recommended)
- Extra key lime zest for garnish
Substitutions and Variations
One of the best things about this Key Lime Pie Bars recipe is how versatile it is. If you can't find certain ingredients or want to experiment with new flavors, here are some substitutions and variations you can try:
- Lime Juice: If key limes aren’t available, you can substitute with regular limes. The flavor will still be tangy, but key limes are a bit more intense and fragrant. You can even mix regular lime juice with lemon juice to mimic the distinctive taste of key limes.
- Graham Crackers: Swap out graham crackers for digestive biscuits, vanilla wafers, or even ginger snaps for a unique twist on the crust.
- Sweetened Condensed Milk: For a dairy-free version, use coconut condensed milk. This will add a subtle coconut flavor to your bars that pairs well with lime.
- Crust Variations: Add some shredded coconut or finely chopped nuts (like pecans or almonds) to the crust for extra texture and flavor.
Step-by-Step Cooking Instructions

To make these Easy Key Lime Pie Bars, follow this simple step-by-step guide. Whether you’re a beginner or an experienced baker, you’ll have no trouble bringing these bars to life.
Step 1: Preheat the Oven
Begin by preheating your oven to 350°F (175°C). Line an 8x8-inch square baking dish with parchment paper, leaving some overhang on the sides for easy removal later.
Step 2: Prepare the Crust
In a medium-sized bowl, combine the graham cracker crumbs, granulated sugar, melted butter, and a pinch of salt. Stir until the mixture resembles wet sand. Press the crumb mixture firmly into the bottom of your prepared baking dish to form an even layer. Use the bottom of a glass or measuring cup to help compact the crust. Bake the crust in the preheated oven for about 10 minutes or until it's lightly golden. Remove and let it cool while you prepare the filling.
Step 3: Make the Key Lime Filling
In a large mixing bowl, whisk together the egg yolks until slightly thickened. Add the sweetened condensed milk, key lime juice, key lime zest (if using), and vanilla extract. Whisk until everything is well combined and smooth.
Step 4: Assemble the Bars
Pour the lime filling over the cooled graham cracker crust. Use a spatula to spread it out evenly. Return the dish to the oven and bake for 15-18 minutes, or until the filling is set but still has a slight jiggle in the center.
Step 5: Cool and Chill
Once the bars are baked, remove them from the oven and allow them to cool to room temperature. Then, place the bars in the refrigerator to chill for at least 2 hours, or until they are fully set and firm.
How to Cook Key Lime Pie Bars: A Step-by-Step Guide
For a more in-depth look at the process, here’s a step-by-step breakdown:
- Preheat the Oven: Set your oven to 350°F and line your baking dish.
- Prepare the Crust: Crush graham crackers, mix with melted butter and sugar, and press into the pan.
- Bake the Crust: Bake the crust until golden and let it cool slightly.
- Prepare the Filling: Whisk together egg yolks, sweetened condensed milk, lime juice, zest, and vanilla until smooth.
- Pour and Bake: Pour the filling over the crust and bake until the filling is set.
- Chill: Let the bars cool, then refrigerate until firm.
- Slice and Serve: Once chilled, cut into squares and top with whipped cream and zest.
Common Mistakes to Avoid
- Not pressing the crust firmly: If your crust isn’t packed tightly, it could crumble when you slice the bars.
- Overbaking: Keep an eye on the bars while baking. Overbaking can cause the filling to crack. You want the center to still jiggle slightly when you remove them from the oven.
- Skipping the chill time: The bars need time to set in the fridge, so don’t rush this step! Chilling helps the flavors meld and makes it easier to slice clean bars.
Serving and Presentation Tips
For a stunning presentation, cut your Key Lime Pie Bars into even squares using a sharp knife. Wipe the knife with a clean cloth between each cut to ensure clean edges. Add a dollop of whipped cream on top of each bar and sprinkle some key lime zest for an extra pop of color and flavor. You can also serve the bars on a platter lined with parchment paper to prevent sticking.
How to Serve Key Lime Pie Bars
These bars are best served chilled straight from the fridge. They make a refreshing dessert, especially on hot summer days. You can serve them with a side of fresh berries, a drizzle of raspberry sauce, or even a scoop of vanilla ice cream for a more decadent treat.
Presentation Ideas for Key Lime Pie Bars
- Rustic Charm: Serve the bars on a wooden cutting board for a laid-back, rustic vibe.
- Individual Servings: For parties or gatherings, place each bar in a mini cupcake liner for easy serving and less mess.
- Dessert Plate: Plate the bars with a dusting of powdered sugar around the edges and a sprig of mint for a restaurant-quality look.
Key Lime Pie Bars Recipe Tips
- Room Temperature Ingredients: Make sure your egg yolks are at room temperature to ensure a smooth, velvety filling.
- Zest First: If you're using key lime zest, always zest the limes before juicing them. It’s much harder to zest after the limes have been juiced.
- Use Fresh Lime Juice: Freshly squeezed lime juice is key to achieving the best flavor. Bottled juice doesn’t compare to the real deal.
Frequently Asked Questions (FAQs)
Can I use regular limes instead of key limes?
Yes, you can! Regular limes will work just fine, though the flavor might be slightly less intense. You can also use a mixture of lime and lemon juice for a closer approximation to key lime flavor.
How long can I store Key Lime Pie Bars?
You can store Key Lime Pie Bars in an airtight container in the refrigerator for up to 4 days. They can also be frozen for up to 1 month; just thaw them in the fridge before serving.
Can I make these bars ahead of time?
Yes! These bars are perfect for making ahead. Simply bake them, chill, and store in the fridge until ready to serve.
What’s the best way to slice these bars?
For clean slices, make sure the bars are fully chilled. Use a sharp knife and wipe it clean between cuts to avoid any mess.
Conclusion
These Easy Key Lime Pie Bars are the perfect combination of tart and sweet, making them an irresistible treat for any occasion. Whether you’re a seasoned baker or just starting out, this recipe is simple and foolproof. With a buttery graham cracker crust and a tangy, creamy lime filling, these bars will quickly become a favorite in your dessert repertoire. Try this recipe today, and don’t forget to share with family and friends—everyone will be asking for seconds!
PrintEasy Key Lime Pie Bars Recipe
This Easy Key Lime Pie Bars recipe features a zesty lime filling atop a buttery graham cracker crust. With just a few simple ingredients, you’ll have a delicious dessert perfect for summer parties or any gathering. The key ingredient, lime juice, gives these bars their refreshing flavor. Best of all, they come together quickly, making them a must-try dessert!
- Prep Time: 10 minutes
- Cook Time: 25 minutes
- Total Time: 2 hours 35 minutes (including cooling time)
- Yield: 9 bars
- Category: Dessert
- Method: Baking
- Cuisine: American
- Diet: Vegetarian
Ingredients
- Graham cracker crumbs
- Sugar
- Unsalted butter
- Sweetened condensed milk
- Key lime juice
- Egg yolks
- Lime zest (optional)
Instructions
- Preheat the oven to 350°F and line an 8x8 baking pan with parchment paper.
- Mix graham cracker crumbs, sugar, and melted butter. Press into the pan to form the crust. Bake for 10 minutes.
- In a bowl, whisk together sweetened condensed milk, lime juice, egg yolks, and lime zest until smooth.
- Pour the mixture over the baked crust and return to the oven. Bake for 15-18 minutes, until set.
- Let cool completely before refrigerating for at least 2 hours.
- Cut into bars and serve chilled.
Notes
- For extra flavor, use freshly squeezed key lime juice.
- Garnish with lime zest or whipped cream for an extra touch.
Nutrition
- Serving Size: 1 bar
- Calories: 230
- Sugar: 18g
- Sodium: 100mg
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