Easy Creamy Key Lime Pie Bars Recipe

If you’ve ever wanted key lime pie bars without the fuss of perfect pie slices, this is your kind of dessert. They’re cool, creamy, and tangy, with a buttery graham crust that snaps gently under a silky lime filling.

I make these when I need something bright for a weeknight treat, a BBQ, or a holiday dessert table, and they travel like a dream. They feel a little fancy, but kids love the sweet-tart bite and the crumbly crust.

Why You’ll Love My Creamy Key Lime Pie Bars

These bars give you everything you love about classic key lime pie: bright citrus, creamy filling, and a crumbly graham base without the stress of slicing a pie neatly. Key lime pie traces back to the Florida Keys, where key limes were prized for their punchy tartness, and bars are the modern, picnic-friendly cousin that’s easier to share.

Simple Ingredients

A short, sweet list that turns into the dreamiest dessert squares.

• Graham crackers: They make the crust sturdy and snackable, with that classic honeyed crunch.
• Butter: Binds the crumbs and adds rich, toasty flavor once baked.
• Granulated sugar: Sweetens both crust and filling so the lime tastes bright, not sharp.
• Sweetened condensed milk: The magic for a thick, creamy filling with minimal effort.
• Egg yolks: Help the filling set into clean, sliceable bars.
• Key lime juice: The star, bringing bold tang and that unmistakable citrus kick.
• Lime zest: Adds fresh aroma and extra zing without extra liquid.
• Vanilla extract: Rounds out the filling and softens the tart edges.
• Salt: A tiny pinch makes the flavors pop.
• Whipped cream (optional): A soft, fluffy topping to mellow the citrus.

Time and Servings

• Servings: 16 bars
• Prep time: 15 minutes
• Cook time: 20 minutes
• Total time: 35 minutes (plus chilling time)

Recommended Equipment

• 8×8-inch baking pan
• Parchment paper
• Mixing bowls
• Measuring cups and spoons
• Microplane or fine grater (for zest)
• Citrus juicer
• Whisk
• Rubber spatula
• Food processor (optional for crust)
• Cooling rack
• Sharp knife for slicing

Ingredients

• 2 cups graham cracker crumbs
• 8 tbsp unsalted butter, melted
• 2 tbsp granulated sugar (for crust)
• 1/4 tsp salt
• 1 can (14 oz) sweetened condensed milk
• 4 large egg yolks
• 1/2 cup key lime juice
• 1 tbsp lime zest
• 1 tsp vanilla extract
• Whipped cream, for serving (optional)
• Extra lime zest or lime slices, for garnish (optional)

How to Make Key Lime Pie Bars

1. Prep the pan: Line an 8×8-inch pan with parchment, leaving overhang for easy lifting. Preheat oven to 350°F (175°C).
2. Make the crust: Mix graham cracker crumbs, melted butter, sugar, and salt until it looks like wet sand.
3. Bake the crust: Press firmly into the pan (use the bottom of a measuring cup). Bake 10 minutes, then cool 5 minutes.
4. Mix the filling: Whisk condensed milk and egg yolks until smooth. Whisk in key lime juice, lime zest, and vanilla until glossy and slightly thickened.
5. Bake again: Pour filling over warm crust. Bake 10–12 minutes, just until the center is set but still has a gentle jiggle.
6. Cool properly: Cool on a rack to room temp, then chill at least 3 hours (overnight is even better).
7. Slice cleanly: Lift out using parchment. Wipe knife between cuts for tidy edges.
8. Serve: Top with whipped cream and a pinch of zest if you like.

What To Serve With This Recipe

• Fresh berries (strawberries or raspberries are especially nice)
• Iced tea or lemonade
• Coconut ice cream
• Fresh fruit salad
• Coffee for the adults, milk for the kids

Top Tips

• Chill for clean slices: Warm bars smear, chilled bars slice like a dream.
• Press the crust firmly: A tight crust means the kids can pick these up without crumbling everywhere.
• Use zest wisely: Zest first, then juice, and avoid the bitter white pith.
• Make-ahead friendly: These are better the next day, so they’re perfect for parties and potlucks.
• Knife trick: Run your knife under hot water, wipe dry, then slice for super neat edges.

Recipe Variations

• Coconut key lime bars: Add 1/2 cup toasted coconut to the crust.
• Chocolate drizzle: Drizzle cooled bars with melted white or dark chocolate.
• Mini bar bites: Make in a muffin tin with liners for grab-and-go portions.
• Extra tangy: Add an extra teaspoon of zest or a tablespoon of juice (don’t overdo it, or it may soften the set).
• Ginger crust: Swap part of the graham crumbs for ginger cookie crumbs.

How to Store and Reheat

• Store: Keep bars covered in the fridge up to 5 days.
• Freeze: Freeze sliced bars (no whipped cream) in a single layer, then bag them for up to 2 months. Thaw overnight in the fridge.
• Reheat: These are meant to be served chilled, so no reheating is needed.

A couple of other delicious recipes you will love are this easy creamy cheesecake or my creamy no-bake pumpkin cheesecake bars!

Key Lime Pie Bars

Michelle

Chilled key lime pie bars with a buttery graham crust and silky, sweet-tart lime filling that slices neatly for easy serving.

Print Recipe Pin Recipe

Prep Time 15 minutes mins

20 minutes mins

Total Time 35 minutes mins

Course Dessert

Servings 16 Bars

Equipment

• 8×8-inch baking pan
• Parchment paper
• Mixing bowls
• Measuring cups and spoons
• Microplane or fine grater (for zest)
• Citrus juicer
• Whisk
• Rubber spatula
• Food processor (optional for crust)
• Cooling rack
• Sharp knife for slicing

Ingredients

  

• 2 cups graham cracker crumbs
• 8 tbsp unsalted butter melted
• 2 tbsp granulated sugar for crust
• 1/4 tsp salt
• 1 can 14 oz sweetened condensed milk
• 4 large egg yolks
• 1/2 cup key lime juice
• 1 tbsp lime zest
• 1 tsp vanilla extract
• Whipped cream for serving (optional)
• Extra lime zest or lime slices for garnish (optional)

Instructions

 

• Prep the pan: Line an 8×8-inch pan with parchment, leaving overhang for easy lifting. Preheat oven to 350°F (175°C).
• Make the crust: Mix graham cracker crumbs, melted butter, sugar, and salt until it looks like wet sand.
• Bake the crust: Press firmly into the pan (use the bottom of a measuring cup). Bake 10 minutes, then cool 5 minutes.
• Mix the filling: Whisk condensed milk and egg yolks until smooth. Whisk in key lime juice, lime zest, and vanilla until glossy and slightly thickened.
• Bake again: Pour filling over warm crust. Bake 10–12 minutes, just until the center is set but still has a gentle jiggle.
• Cool properly: Cool on a rack to room temp, then chill at least 3 hours (overnight is even better).
• Slice cleanly: Lift out using parchment. Wipe knife between cuts for tidy edges.
• Serve: Top with whipped cream and a pinch of zest if you like.

Notes

• Key lime juice is ideal, but bottled key lime juice works well when fresh key limes are hard to find.
• Chill at least 3 hours for the best texture and easiest slicing.
• For extra tidy cuts, wipe the knife between slices.

Keyword Key Lime Pie Bars