These Key Lime Pie Bars are creamy, tangy, and perfectly balanced with a buttery graham cracker crust for a refreshing dessert bar. Made with real key lime juice and sweetened condensed milk, this easy key lime dessert recipe is perfect for summer parties, make-ahead treats, and citrus lovers.
If you love key lime pie but don’t love slicing, plating, or dealing with a full pie, these Key Lime Pie Bars are about to become your new favorite dessert. They’re cool, creamy, and packed with bright citrus flavor, all sitting on top of a classic buttery graham cracker crust.
These homemade Key Lime Pie Bars are simple, nostalgic, and incredibly satisfying. One bite turns into two, and suddenly the pan is mysteriously half gone. They’re like a bite of sunshine or Florida!
Not to be confused with cheesecake with cream cheese, the filling in these pie bars is a bit different. It’s quite creamy with a sweet and tart taste. Delish!
What I Love About This Recipe
- I love how bold and refreshing the flavor is. The key lime juice brings that signature tangy bite, while the sweetened condensed milk keeps everything smooth and creamy. It’s the perfect sweet-tart balance.
- The texture is spot-on. The filling sets up beautifully without being dense or heavy, and the crust holds together without crumbling. Every slice looks clean and polished.
- This recipe is wonderfully low-effort. A quick crust, a one-bowl filling, and the oven does the rest. Most of the time is hands-off chilling.
- These bars are perfect for entertaining. They’re easy to slice, easy to serve, and taste even better when made ahead, which is always a win.
Equipment You May Need
- Square Baking Pan – An 8-inch-by-8-inch pan creates thick, neat bars.
- Mixing Bowls – One for the crust and one for the filling.
- Electric Hand Mixer – Helps whip the yolks into a light, smooth filling.
- Zester – Adds fresh lime zest for extra citrus punch.
(Full printable recipe card is at bottom of post.)
Key Lime Pie Bars Ingredients
For the Crust
- Graham Cracker Crumbs – The classic base that adds crunch and warmth.
- Unsalted Butter – Binds the crumbs and adds richness.
For the Filling
- Egg Yolks – Thicken the filling and create a silky texture.
- Key Lime Zest – Intensifies the citrus flavor.
- Sweetened Condensed Milk – Adds sweetness and creaminess.
- Key Lime Juice – Provides that iconic tart key lime flavor.
How to Make Key Lime Pie Bars
Step One: Prep the Oven and Pan
Preheat the oven to 350°F. Lightly grease an 8-inch-by-8-inch square baking pan and set aside.
Step Two: Make the Crust
In a medium bowl, mix together the graham cracker crumbs and melted butter until evenly combined. Press the mixture firmly and evenly into the bottom of the prepared pan to form the crust.
Step Three: Make the Filling
In a medium bowl, beat the egg yolks and key lime zest with an electric mixer for about 2 minutes, or until the mixture looks frothy and light. Beat in the sweetened condensed milk until smooth, then add the key lime juice and mix until fully blended and slightly thickened.
Step Four: Bake and Chill
Pour the filling over the crust and spread evenly. Bake for 15 to 20 minutes, or until the filling is set. Cool completely at room temperature, then refrigerate for 3 to 4 hours, or until fully chilled before slicing.
(Full printable recipe card with full details is at bottom of post.)
Serving Suggestions
- Dust lightly with powdered sugar before serving or some white chocolate shavings.
- Top with whipped cream and lime zest.
- Serve straight from the fridge for the best texture.
- You could also serve with a simple strawberry sauce or raspberry sauce for more fruit flavor.
Quick Tips
- Use fresh key lime juice for the brightest flavor.
- Chill fully before slicing for clean bars.
- A sharp knife wiped clean between cuts helps presentation.
- You can cut the bars into any shape, such as squares, triangles, or rectangles. You can also cut them into jumbo large bars or small mini bars.
- For a bakery or restaurant-style presentation, you could also bake these bars in individual pans or ramekins.
Key Lime Pie Bars FAQ
How should I store Key Lime Pie Bars?
Store in an airtight container in the refrigerator for up to 4 days.
Can I freeze Key Lime Pie Bars?
Yes. These bars freeze well for up to 2 months. Thaw in the refrigerator before serving, or enjoy partially frozen for a cool treat.
How long will Key Lime Pie Bars last?
They’re best within a few days but hold their texture well when refrigerated.
Substitutions?
Use regular limes or bottled key lime juice if fresh key limes aren’t available. You could use other citrus instead if you’d like, such as lime, lemon, or orange.
Can I use low-fat ingredients?
Full-fat condensed milk and eggs give the best texture, so low-fat substitutions are not recommended.
What else can I add to this recipe?
Try a coconut graham crust or add a thin layer of whipped cream on top after chilling. You could also add some finely chopped macadamia nuts to the crust. For a brighter green color, you could add a little food dye to the filling. You can add a little vanilla extract or other flavorings to the filling if you’d like.
Can I make this vegan/vegetarian/low carb/gluten-free?
Here are some suggestions, but I can’t guarantee results. Be sure as always to check particular brands and ingredients if you’re following a specific diet or have diet restrictions or allergies.
Vegan – Use a dairy-free condensed milk alternative and egg substitutes.
Vegetarian – It’s vegetarian. Be sure to check individual brands/products just to be sure though.
Low-Carb – You can try a sugar substitute and a low-carb crust.
Gluten-Free – Use gluten-free graham crackers for the crust.
Other Citrus Recipes You May Enjoy
- Homemade Orange Pound Cake – A delicious homemade cake with a hint of citrus.
- Lemon Loaf Cake – Starbucks copycat cake baked in a bread pan and loaded with lemon flavor.
- Grilled Lemon Rosemary Chicken – A savory citrus dish that is great in the summer!
Hope you enjoy this from-scratch Key Lime Pie Bars recipe. Tell me in the comments if you topped them with powdered sugar, whipped cream, or something else.
If you like pie bars, you may also like these tasty Mango Bars!
Key Lime Pie Bars
Ingredients
Crust:
- Butter for greasing the pan
- 1 cup graham cracker crumbs 7 or 8 graham crackers
- 3 tablespoons unsalted butter melted
Filling:
- 3 large egg yolks
- 1 teaspoon fresh key lime zest
- 1 (14-ounce can) sweetened condensed milk
- ½ cup fresh key lime juice
Instructions
- Preheat the oven to 350˚F. Lightly grease an 8-inch-by-8-inch square baking pan or line bottom and sides of pan with parchment paper.
- In a medium bowl, mix together the graham cracker crumbs and melted butter. Press the mixture evenly into the bottom of the pan.
- In a medium bowl, beat the egg yolks and lime zest with an electric mixer about 2 minutes, or until frothy. Beat in the condensed milk, and then the lime juice, until well blended and thickened.
- Pour the filling over the crust. Bake for 15 to 20 minutes, or until set. Cool completely, then refrigerate for 3 to 4 hours, or until completely chilled.
Notes
- You can also freeze this pie for a frozen dessert.
- These bars can be pretty tart, depending on your limes. Sweeten the deal with a garnish of powdered sugar, whipped cream, and/or quartered key lime slices.
- If you can’t find key limes, you can substitute limes or bottled key lime juice.
Nutrition:
(Nutrition data is provided when available for informational purposes only and calculated using an online nutritional calculator. For the most accurate information please calculate based on specific ingredients and brands you use as well as any changes you made to the recipe. I am not a certified nutritionist or registered dietician and any nutritional information provided should only be used as a general guideline and estimate.)
About Lisa Huff
Lisa Huff is a Cookbook Author, Freelance Recipe Developer, Food Photographer, Blogger/Writer, and award-winning home chef. She loves creating unique recipes from healthy to decadent including cocktails, appetizers, main dishes, dessert recipes and more and has appeared on various shows, publications, and websites.
