Key Lime Bars

These Key Lime Bars are everything I want in a summer dessert—bright, creamy, just the right amount of tang, and perfectly balanced with a buttery graham cracker crust. I love how they channel all the flavors of classic Key lime pie but in a more shareable, bar-style form. They’re easy to make, super refreshing, and always a hit at potlucks and family gatherings.

Why You’ll Love This Recipe

I like how quick and fuss-free these are compared to a full pie. The graham cracker crust is rich and simple, the filling is silky with the perfect citrus kick, and the Cool Whip topping brings a light, airy finish. There’s no need for fancy tools or techniques—just a few simple steps and a chill in the fridge. I can even make them the night before and they taste even better the next day.

ingredients

(Here’s a tip: Check out the full list of ingredients and measurements in the recipe card below.)

Crust

• Cooking spray
• 9 graham crackers, crushed
• 6 tablespoons butter, melted
• 1/4 cup granulated sugar

Lime Filling & Assembly

• 4 oz. cream cheese, room temperature
• 4 large egg yolks
• 1 (14-oz.) can sweetened condensed milk
• 1/2 cup fresh lime juice
• Pinch of kosher salt
• 1 cup Cool Whip
• Zest of 1 lime
• 3 Key limes or 2 regular limes, sliced into rounds

directions

1. I preheat the oven to 350°F and grease an 8″ x 8″ pan with cooking spray.
2. In a medium bowl, I mix the crushed graham crackers, melted butter, and sugar. I press this mixture firmly into the bottom of the greased pan.
3. I bake the crust for about 10 minutes, just until it’s slightly darkened and fragrant.
4. While the crust is baking, I beat the cream cheese in a large bowl with a handheld mixer until smooth.
5. I add the egg yolks, sweetened condensed milk, lime juice, and a pinch of salt. I beat until everything is fully combined.
6. I pour the filling over the baked crust and return it to the oven, baking for 15 to 20 minutes until the filling is set.
7. I let the bars cool, then refrigerate them for at least 2 hours or overnight.
8. When ready to serve, I cut the bars into squares and top each with a dollop of Cool Whip, a slice of lime, and a sprinkle of lime zest.

Servings and timing

This recipe yields 12 servings. It takes just 10 minutes to prep, around 30 minutes to bake and cool, and at least 2 hours to chill in the fridge.

Variations

• Use Lemon Instead: I sometimes swap the lime juice for lemon for a bright lemon bar version.
• Add Coconut: A sprinkle of shredded coconut on top or in the crust gives a tropical twist.
• Make It Whipped Cream from Scratch: When I have time, I whip heavy cream with a bit of sugar for a homemade topping.
• Mini Bar Version: I use a muffin tin for bite-size versions—great for parties.
• Crust Swap: I’ve tried vanilla wafer crumbs instead of graham crackers and loved the subtle flavor change.

storage/reheating

I keep these bars in an airtight container in the fridge. They stay fresh for 4 to 5 days. I don’t reheat them—they’re meant to be served chilled. If I need to make them ahead, I store the bars and add the Cool Whip and lime garnish just before serving for the freshest presentation.

FAQs

Can I use regular limes instead of Key limes?

Yes, I often use regular limes if Key limes aren’t available. The flavor is slightly different, but still delicious.

Can I freeze Key Lime Bars?

I can freeze them, but I skip the Cool Whip topping until after they thaw. I wrap them tightly and freeze for up to 2 months.

Can I use bottled lime juice?

I’ve done it in a pinch, but I always prefer fresh lime juice for the best flavor and acidity.

Do I need to use cream cheese?

Yes, it gives the bars a creamy texture and tang. If I substitute, I use Greek yogurt, but the texture will be slightly softer.

How do I cut clean slices?

I use a sharp knife dipped in warm water and wiped clean between each cut. That helps keep the edges neat and prevents sticking.

Conclusion

These Key Lime Bars are the perfect warm-weather dessert—easy to make, full of tangy flavor, and ideal for sharing. I love how they come together with just a few ingredients and always steal the spotlight at gatherings. Whether I’m making them for a picnic or a last-minute dinner party, they never fail to impress.

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