Name: Key Lime Pie Bars
Prep time: 15 min
Cook time: 45 min
Total time: 1 h
Cuisine: American
Ingredients: 1 ½ cups graham cracker crumbs; ¼ cup granulated sugar; ½ teaspoon ground cinnamon; 6 tablespoons salted butter, melted; 28 ounces sweetened condensed milk; ½ cup sour cream; 4 large egg yolks; ¾ cup key lime juice; ¼ teaspoon pure vanilla extract; 2 teaspoons lime zest (optional)

Jump to Recipe · Leave a Review

There’s something undeniably enticing about the vibrant, citrusy aroma of Key Lime Pie Bars wafting through your kitchen. Picture this: a creamy, tart filling sitting atop a perfectly golden crust that crumbles beautifully with each bite. Not only do these bars capture the essence of the classic key lime pie, but they also present an easier, shareable form that’s perfect for gatherings or simply indulging at home.

Pin this for later!

These bars are not just a summer delight; they’re a refreshing treat year-round. With minimal prep time—just 15 minutes—and a straightforward process, they step in gracefully for those moments when you’re craving something sweet yet sophisticated. Whether it’s a potluck, casual weeknight dessert, or a last-minute treat for friends dropping by, these bars are bound to impress. So gather your ingredients, roll up your sleeves, and let’s bring a taste of Florida sunshine to your table.

Table of Contents

Why You’ll Love This Recipe
Ingredients You’ll Need
How to Make Key Lime Pie Bars
Storing & Reheating
Chef’s Helpful Tips
Recipe FAQs
Key Lime Pie Bars

Why You’ll Love This Recipe

Simple & Quick: Whip these up in just 15 minutes, and enjoy their zesty goodness quickly!
Irresistible Flavor: The tangy key lime meets creamy sweetness in a heavenly balance.
Eye-Catching Appeal: Freshly zested lime and whipped cream on top make for beautiful presentation.
Flexible Serving: Great for summer BBQs, picnics, or even as a delightful end to a casual dinner.
Diet-Friendly Options: Easily adaptable for gluten-free dietary needs—just swap in gluten-free graham crackers.

Ingredients You’ll Need

1 ½ cups graham cracker crumbs: These create the delightful, crunchy crust. For best results, opt for plain graham crackers.
¼ cup granulated sugar: This adds just the right amount of sweetness to balance your crust.
½ teaspoon ground cinnamon: Adds a warm spice that complements the citrus beautifully.
6 tablespoons salted butter (melted): The fat in the butter helps bind the crust and adds richness.
28 ounces sweetened condensed milk: Ensures a luscious, creamy filling that’s not overly tangy.
½ cup sour cream: Adds depth and a subtle tanginess that brightens the overall flavor.
4 large egg yolks: These help set the filling, giving it that perfect velvety texture.
¾ cup key lime juice: The star ingredient, key lime juice delivers that tart punch.
¼ teaspoon pure vanilla extract: Helps round out the flavors for a harmonious taste.
2 teaspoons lime zest (optional): For an added fresh twist and visual appeal.

How to Make Key Lime Pie Bars

Preheat Your Oven: Start by preheating your oven to 350 degrees Fahrenheit (177 degrees Celsius). This is essential for baking the crust and filling properly.
Prepare the Baking Dish: Line a 9” square baking dish with parchment paper, leaving handles for easy removal. Lightly grease the paper, ensuring an easy release after baking.
Combine the Filling Ingredients: In a large bowl, whisk together 28 ounces of sweetened condensed milk, ½ cup of sour cream, 4 large egg yolks, ¾ cup of key lime juice, and ¼ teaspoon of pure vanilla extract until smooth. If you’re using lime zest, whisk that in too for more flavor. Set this mixture aside for now.
Make the Crust: If needed, create the graham cracker crumbs by breaking 12 whole graham crackers and processing them in a food processor until they’re fine crumbs—no chunks allowed!
Mix the Crust Ingredients: In a different bowl, mix together the graham cracker crumbs, ¼ cup of granulated sugar, and ½ teaspoon of ground cinnamon until combined.
Combine with Butter: Pour in 6 tablespoons of melted salted butter and stir until everything is mixed well into a crumbly mixture.
Press the Crust into the Dish: Firmly press the crumb mixture evenly into the bottom of your prepared baking dish, creating a solid base.
Bake the Crust: Place this in your preheated oven and bake for about 5 minutes. Let it cool slightly before adding the filling.
Add the Filling: Once the crust has baked, gently pour the key lime filling into the crust, spreading it evenly.
Bake Again: Return the pan to the oven and bake for 22-27 minutes. You want the edges to look set while the center remains slightly jiggly—this will firm up as it cools.
Cool and Chill: Remove from the oven and let it cool on a wire rack. After cooling, transfer it to the refrigerator to chill for at least 6 hours, or preferably overnight, allowing the flavors to meld beautifully.
Slice and Serve: Once chilled, run a knife along the edges to loosen the bars. Lift them out using the parchment handles and place them on a cutting board. Cut them into 16 squares.
Top with Whipped Cream: Garnish with homemade whipped cream (optional), making them even more indulgent.
Chill Before Serving: Serve the bars cold and store them in the refrigerator until ready to enjoy.

Storing & Reheating

To store your delicious Key Lime Pie Bars, keep them in an airtight container in the refrigerator where they’ll last for about a week. If you need longer storage, you can freeze them for up to three months—just wrap them well in plastic wrap and aluminum foil to avoid freezer burn. When ready to enjoy, just let them thaw in the refrigerator for a few hours. The texture may change slightly after freezing, but a quick chill will refresh their flavor and texture nicely.

Chef’s Helpful Tips

Avoid Overmixing: When whisking the filling, mix just until combined. Overmixing can lead to a watery filling.
Room Temperature Eggs: Using room temperature eggs in your filling helps it come together more smoothly.
Cool Properly: Ensure the bars cool completely before chilling—this helps with setting and enhances the flavor.
Fresh Key Limes: If you can, use fresh key limes for the juice and zest for an authentic flavor.
Make-Ahead: These bars are fantastic make-ahead treats. Prepare them a day prior for easy entertaining.

There’s something refreshing about biting into these sweet and tangy Key Lime Pie Bars. Whether enjoyed solo with a cup of tea or at a lively gathering, their appeal never wanes. Feel free to play around with garnishes or even add fresh fruit for an extra pop of color and flavor.

Recipe FAQs

What type of lime juice should I use for Key Lime Pie Bars?

For the best flavor, always use freshly-squeezed key lime juice, if available. It has a more vibrant and authentic taste compared to bottled varieties, which can be overly sweet or less tangy. However, if you can’t find key limes, Persian limes are a suitable substitute, though they’re less tart.

Can I use a different type of crust?

Absolutely! If you prefer, switch out graham crackers for crushed cookies like vanilla wafers or even Oreo cookies for a chocolate twist. Just be sure to adjust the sugar in the crust based on the sweetness of the cookies you choose.

How do I fix a filling that’s too runny?

If your filling doesn’t set properly, it could be due to not baking long enough or the filling being too warm when it went in the fridge. Ensure you bake until the edges are set and always let it cool completely before chilling. If you’re at risk of a runny filling, adding an extra egg yolk can help.

Can I make these dairy-free?

Yes! For a dairy-free version, use coconut cream in place of sour cream, and opt for a dairy-free condensed milk alternative, which is widely available in many health food stores. Just ensure your graham crackers or alternative crust are also dairy-free.

More Desserts & Appetizers Recipes

Carrot Cake Bars

👉 If you make my Key Lime Pie Bars recipe, please leave a comment and a star rating — it really helps others discover the recipe.
Follow me on Pinterest for more easy recipes.