I brought these bars to a summer picnic last year and they were gone in minutes. I am telling you the creamy texture and that sharp zesty lime flavor are just unbeatable. I love making these because they are so much easier to serve than a traditional pie and they always make me look like a pro baker even when my kitchen is a total disaster. There is something about that bright citrus pop on a hot day that just makes everyone happy.

Why You Will Love This key lime pie bars recipe

You are going to obsess over how the buttery graham cracker crust plays against that tart filling. It only takes a handful of ingredients and barely any prep time so you are not stuck in the kitchen all day. Plus these bars slice up like a dream which makes them perfect if you are trying to meal prep treats for the week or if you need something impressive for a party. They are sturdy enough to hold but still melt in your mouth.

Ingredients for key lime pie bars recipe

One and a half cups of graham cracker crumbs
Six tablespoons of melted butter
Three tablespoons of granulated sugar
Two cans of sweetened condensed milk
Four large egg yolks
Three quarters of a cup of fresh key lime juice
A mix of regular lime and lemon juice if you cannot find key limes

How to Make key lime pie bars recipe Step-by-Step

The whole process is pretty quick but you need to plan ahead. The total time including the chilling is about four hours. Do not try to rush it because the bars need that time to get firm enough to slice. If you try to eat them too soon they will just be a delicious puddle.

Preparing the Crust for key lime pie bars recipe

Mix your crumbs with the melted butter and sugar until it feels like wet sand. Press that mixture really firmly into a lined baking pan so it does not crumble later. I usually use the bottom of a measuring cup to get it flat. Bake it at 350 degrees for about eight to ten minutes just to ensure you have a crisp base that can hold up the filling.

Making the Filling for key lime pie bars recipe

Grab a bowl and whisk those egg yolks with the sweetened condensed milk until the mixture looks completely smooth. Then you just pour in your lime juice. It is actually really cool because you will see the mixture start to thicken up naturally just from the acidity of the lime juice reacting with the milk.

Baking and Cooling

Pour that filling over your crust and bake it for about fifteen minutes. You want it to be set but still have a tiny bit of wiggle. Let the bars sit on the counter until they reach room temperature before you even think about putting them in the fridge. You must let them chill for at least three hours to make sure they set properly.

Expert Tips for the Best key lime pie bars recipe

I always use room temperature eggs because it makes the filling way smoother. Also try not to overbake them or you might get cracks on the top which is fine but not as pretty. When you are ready to serve use a hot knife to get those clean professional looking slices. Just dip the knife in hot water and wipe it off between every single cut.

Storage and Freezing Instructions

You can keep these bars fresh by putting them in an airtight container in the fridge for up to five days. If you want to save some for later you can actually freeze them for up to three months. Just make sure you wrap them really tightly so they do not get any freezer burn and they will taste just as good when you thaw them out.

Frequently Asked Questions about key lime pie bars recipe

Can I use bottled lime juice

You definitely can use bottled juice if you are in a pinch but fresh juice always gives it a much brighter flavor. If you use bottled just make sure it is high quality.

How do I know when the bars are done

The edges should look firm and stable but the very center should still have a slight jiggle when you gently shake the pan. It will firm up the rest of the way as it cools down.

Nutritional Information

Calories: 280 kcal
Total Fat: 12g
Carbohydrates: 38g
Sugars: 29g
Protein: 5g