Lemon Lime Basil Squares

Lemon and lime, their scent just says spring, doesn’t it? There are few things I love more than lemons and limes. I squeeze lemon juice in fruit, salads, soups, you name it. When I was pregnant with my second one, I would suck on lemons all day to get rid of morning sickness, that’s how much I love them LOL!

When it comes to lemon desserts, you guessed it, I absolutely love a tangy key lime pie, or a tart lemon square. These squares are so fantastic! Lemon AND lime perfectly combined with the freshness of basil. The perfect spring dessert. Best of all? So easy to make!

One of the most fun things about this recipe is all the little gadgets and cooking tools I got to use! I loooove to have little gadgets for the kitchen. They make me happy, and sometimes they are not essential but they are cool to have!

These are all the cooking tools I used to make these squares:

cooking tools used in this recipe

How I made these delicious Lemon Lime and Basil Squares:

Ingredients needed to make the lemon lime basil squares

Let’s start with the crust:

Line a baking mold with parchment paper and spray with nonstick spray for extra precaution. I like to cut the paper so it’s like 5 inches wider on each side of the baking mold.

Then I cut a corner directly parallel and horizontally to each corner of the baking pan. It will look like flaps almost.

After that, I fold the “flaps”into the center square and place the square right at the bottom of the baking mold.

Unfold the flaps and fold over each side of the mold. It should fit in nice and clean.

Step by step pictures of how to line the baking mold.

Tip! Watch the video at the bottom to see exactly how I did it.

Crunch up the graham crackers into a large food processor on in a large ziplock bag. Pulse the crackers until they are finely crushed, like breadcrumbs if you will.

crust consistency

Add the melted butter through the feeding tube of the food processor and combine. Add a pinch of salt and combine once more.

butter drizzled into graham crackers in the food processor.

Tip! Because the crackers are so finely crushed, the butter will help bind the crust together.

Pour the graham cracker mixture into the bottom of the baking mold lined with the parchment paper.

Using the back of a measuring cup, start leveling the graham crackers and packing them into the bottom of the pan. Make sure that the graham crackers are nicely packed in the corners and spread out evenly.

graham cracker crust packed into the bottom of the mold

The filling of the Lemon Lime Basil Squares:

Zest the lemons and limes. Chop the zest finely along with the basil leaves. Set the mixture aside.

I particularly love using this zester for thicker zest strings:

Bar zester
lemon and lime zest

In a large bowl, whisk the eggs and the yolk together.

Add the two cans of condensed milk and combine well.

condensed milk pouring into egg mixture

Add the juice of one lemon and the juice of one lime. Whisk the juices in well.

Lastly, add the zest and basil mixture and once more, mix in well.

filling done

Pour the filling mixture on to the packed crust. Make sure the corners are covered with the filling.

filling being poured on to the crust.

Bake in a 350° oven for 30 minutes. The center will be firm and the sides will be a bit golden and a bit puffed up.

lemon lime basil squares baking in the oven.

Let the squares cool completely and then transfer to the refrigerator to cool and firm up for at least 2 hours.

baked lemon lime basil squares

When completely cold, grab the parchment paper by the overlapping flaps and pull out of the mold.

Cut into even squares. This tool helps mark where to cut the squares so they are all even. It’s a game changer my friends!

Use a knife to follow the lines marked by the wheel divider.

Tip! Run your knife though warm water in between cuts to help keep it clean.

Wheel adjustable dough divider.

Tip! I like to cut the edges off just off of the sides so that all squares look the same.

lemon lime basil squares cut evenly.

Serve cold. Enjoy!

Lemon Lime Basil Squares

The perfect dessert for spring. Lemon and lime combined with basil makes these squares so special and unique. Exrtremely easy to make and perfectly delicious.
Print Recipe Pin Recipe
CuisineAmerican, baked goods
Keywordlemon basil squares, lemon lime squares, lemon squares
Prep Time15 minutes
Cook Time30 minutes
Servings25 squares


  • 9×9 baking mold
  • Food processor
  • whisk
  • bar zester/peeler
  • Wheel adjustable dough divider


  • 15 whole graham crackers 1 1/2 packs
  • 2 tablespoons unsalted butter melted
  • 1 pinch salt
  • 2 14 oz cans condensed milk
  • 2 whole extra large eggs
  • 1 extra large egg yolk
  • 2 lemons zested and the juice of 1
  • 2 limes zested and the juice of 1
  • 6 medium size basil leaves


For the crust:

  • Preheat the oven to 350°.
  • In a large food processor, crunch up the graham crakers into large chunks.
  • Pulse the crackers until they are almost pulverized, like breadcrumbs.
  • Add the melted butter. Combine.
  • Add a pinch of salt and mix in.
  • Line a baking dish with parchement paper and spray nonstick spray to it.
  • Pour the graham cracker mixture on to the bottom of the baking dish.
  • Spread the crackers evenly on to the bottom of the baking dish and pack the mixture evenly with the bottom of a measuring cup.
  • Set aside.

For the filling:

  • Zest all lemons and limes.
  • Finely chop the basil leaves and the lemon and lime zests.
  • Set aside.
  • In a large bowl, whisk the eggs and the egg yolk.
  • Add both cans of condensed milk and combine well.
  • Add the juice of 1 lemon and 1 lime.
  • Whisk in well.
  • Add the lemon, lime, basil mixture into the condensed milk mixture.
  • Mix in well.
  • Pour the filling mixture onto the crust.
  • Make sure all corners are covered evenly.
  • Bake the dessert for 30 minutes.
  • Let cool completely and then refrigerate for at least 2 hours.
  • Cut into squares and serve cold.
  • Enjoy!

Recipe Video Instructions


The kitchen tools used are all optional.
-A regular zester can be used, the only difference is the zest is not as thick.
-A knife can be used to cut the squares, I love using the adjustable wheel dough divider because it gives me perfect lines to follow with my knife.