Key lime pie bars are a refreshing, easy-to-make twist on the classic key lime pie. They offer the same creamy, tart flavor but in a convenient bar form, perfect for any occasion.
These delicious treats feature a zesty lime filling on a buttery graham cracker crust, making them a delightful dessert that will wow your taste buds. They’re an excellent option for a summer gathering or whenever you crave a sweet, tangy bite!

Why You’ll Love Key Lime Pie Bars
Easy to Make
Unlike traditional pies, these bars are simple to prepare. There is no need for a pie crust, and they bake quickly, making them a go-to dessert when you’re short on time.
Delightful Texture
With a buttery, crumbly crust, a smooth, creamy filling, and a light, airy topping, each key lime pie bar layer offers a satisfying texture that makes each bite enjoyable.
Great for Summer
Key lime’s light, refreshing taste is perfect for hot summer days. These bars are chilled before serving, making them a cool, refreshing treat for warm weather.
Ingredients for Key Lime Pie Bars
Here are the key ingredients needed to make delicious Key Lime Pie Bars:
- Graham Cracker Crumbs: These crumbs form the base of the bars, offering a crunchy and sweet foundation.
- Sugar: Sweetens the graham cracker crust and the lime filling.
- Unsalted Butter: Helps bind the graham cracker crumbs together and adds richness to the crust.
- Condensed Milk: Gives the filling a creamy texture and sweet flavor.
- Egg Yolks: Provides structure to the filling and enhances the richness.
- Key Lime Juice: This is the star ingredient, giving the bars their signature tangy flavor.
- Lime Zest: Adds a burst of lime aroma and flavor to the bars.
How to Make Key lime pie bars
Ingredients
Here are the ingredients you’ll need to make these tangy, creamy Key lime pie bars:
Crust:
- 1 ½ cups graham cracker crumbs
- ⅓ cup sugar
- 6 tablespoons unsalted butter, melted
Filling:
- 2 cans (14 oz) sweetened condensed milk
- 4 large egg yolks
- ¾ cup fresh Key lime juice (or bottled Key lime juice)
- 2 teaspoons lime zest
Directions
- Prepare the Crust:
- Preheat your oven to 350°F (175°C).
- Combine graham cracker crumbs, sugar, and melted butter in a medium bowl. Mix well until the crumbs are evenly coated.
- Press the crumb mixture into the bottom of a 9×9-inch baking pan to form an even layer.
- Bake for 10 minutes, then remove from the oven and let cool while you prepare the filling.
- Make the Filling:
- Whisk together the sweetened condensed milk and egg yolks in a large bowl until smooth and well combined.
- Stir in the lime juice and lime zest, mixing until fully incorporated.
- Pour the filling over the cooled graham cracker crust, smoothing it into an even layer.
- Bake:
- Bake the bars for 15-20 minutes, or until the filling is set (it should slightly jiggle when you shake the pan).
- Remove from the oven and let cool at room temperature for about 30 minutes, then transfer to the refrigerator to chill for at least 2 hours.
- Serve:
- Once chilled, cut the bars into squares. Before serving, garnish with whipped cream or lime slices for extra flair.
Key Lime Pie Bars Variation
While traditional key lime pie is a popular favorite, you can easily customize your key lime pie bars. Here are a few variations you can try:
- Coconut Key Lime Bars: Add shredded coconut to the crust for an extra layer of texture and flavor.
- Blueberry Key Lime Bars: Top your bars with fresh blueberries or add them to the filling for a fruity twist.
- Chocolate Key Lime Bars: For a rich contrast of flavors, incorporate a layer of melted chocolate on the crust before adding the lime filling.
- Vegan Key Lime Bars: For a plant-based version of this dessert, replace the dairy products with coconut milk and vegan butter.
How to Serve Key Lime Pie Bars
Key lime pie bars are served chilled for that refreshing, cool bite. Here’s how you can serve them:
- Garnish: For a more decorative touch, top your bars with whipped cream, lime zest, or even a few thin lime slices.
- Pairing: Serve them with a refreshing iced tea or a fruity cocktail to complement their tartness.
- Portions: Slice the bars into small squares for easy sharing, or keep them as larger portions for a more satisfying treat.
Storage Tips
Key lime pie bars are great for making ahead and storing for later. Follow these storage tips to keep them fresh:
- Refrigeration: Store your bars in an airtight container in the fridge for up to 5 days. The cold will help preserve the filling’s creamy texture and keep the crust from becoming soggy.
- Freezing: You can freeze the bars for up to 2 months. Wrap each piece individually in plastic wrap and place them in a freezer-safe bag for easy access.
- Thawing: If frozen, let the bars thaw in the fridge overnight before serving. This helps retain their texture and flavor.
FAQs About Key Lime Pie Bars
What are Key lime pie bars?
Key lime pie bars are a dessert made with a tangy lime filling on a buttery graham cracker crust. They are a portable, easy-to-make variation of the classic Key lime pie.
How do I store Key lime pie bars?
Store your Key lime pie bars in an airtight container in the refrigerator. When properly chilled, they will stay fresh for up to five days.
Can I freeze Key lime pie bars?
You can freeze Key lime pie bars for up to 3 months. To preserve their flavor and texture, wrap them tightly in plastic wrap and foil before freezing.
Are Key lime pie bars easy to make?
Key lime pie bars are relatively easy to make, requiring just a few basic ingredients and simple steps. Most of the time is spent chilling, not actively cooking.