Key Lime Slab Pie

Pies & Tarts, Southern Desserts
This key lime slab pie is yummy and great for gatherings when you need more than a 9". It's sweet and tasty and will fly off the table.

This key lime slab pie is yummy and great for gatherings when you need more than a 9″. It’s sweet and tasty and will fly off the table.


Not only do I live in the South, I live in the “Sunshine State” of Florida. When you think of Florida, it brings to mind beaches, sunny days, and tasty delights. Desserts with a “citrus” flair are big hits down this way and particularly…the bold taste of Key Lime Pie.

In my grandmother’s last years, one of her favorite desserts was Key Lime Pie. She found a frozen pie she liked at the store and kept it in her freezer. She would take it out, cut a slice, and share with my little ones. They ALL LOVED IT!

None of them cared that it was “store bought”. They just liked the rich, decadent taste of lime in a creamy and smooth pie.

If my Mema were alive today, I think she would really enjoy this Key Lime Slab Pie. So..Mema…this one is for you!

Psst… you’ll also love our peach crumble slab.

key lime slab pie with shipped cream and graham cracker crust on white table

Substitutions for the key lime slab

This dessert is rich and tropical just as it is, but if time is an issue, there are some substitutions that would save you some minutes on the clock. You could purchase several “store bought” graham cracker crusts and food process them for the crust layer.

However, they tend to be dry and can crumble. Most often the reason a crust crumbles is that it isn’t moist enough. Use melted butter or a mild olive oil to moisten the crumbs.

Another trick is to brush the crust with an egg wash and bake it for 10 minutes. Let it cool, fill and then bake per the key lime slab directions. The egg wash keeps the crust from getting soggy.

If making your own whipped topping is going to add unnecessary time to your prep, substitute Cool Whip topping. It is light and fluffy and looks heavenly on top of a pie! Another benefit is that it tastes good, and most people love it!

key lime slab pie with key limes and whipped cream

What types of pans can you use or slab pies?

The best pan for a slab pie is a 10 x 15 inch jelly roll pan or a rimmed, rectangular pan. This type of pan will allow you fill it to the brim with crust and filling.

It makes a large pie and when cut, the pie comes out in perfect little bars or “slabs”.

pouring key lime pie batter into a graham cracker crust on a jelly roll pan

What you need…

Ingredients

To make your slab pie, you will need a Graham Cracker Crust which includes -3 ½ cups crushed graham cracker crumbs (about 25 whole graham crackers), ¾ cup butter + 2 tablespoons butter (melted), ¼ cup brown sugar, and ¼ cup white sugar.

For your Key Lime Filling -prepare 3 cups sweet condensed milk, 6 egg yolks, 1 cup of key lime juice, and
4 tablespoons grated lime zest (separated). Mix together until smooth and creamy.

Finally, you will need the ingredients for your Whipped topping– 1 cup heavy cream, ½ cup powdered sugar, and one tablespoon lime zest whipped up to make a decadent and fluffy topping.

slab pie crust in a jelly roll pan

How to make this

Directions

Preheat oven to 350 degrees F. Spray 10 x 15 inch pan with baking spray, then set aside.

For the Crust: Pulse graham crackers in a food processor until finely chopped. Then in a bowl mix together butter, graham cracker crumbs, and sugar. Then firmly press mixture into 10 x 15 into the pan. Bake the crust for 10 minutes. Then allow the crust to cool completely.

For the Key Lime Filling: In a medium bowl combine sweetened condensed milk, eggs,
lime just and 2 tablespoons lime zest. Mix well and pour into the cooled graham cracker crust. Bake in a preheated oven for 10 minutes until small bubbles appear.

DO NOT OVER BAKE. Pie will be slightly jiggly. (increase amount of time in small increments if needed). Cool completely.

Topping: Garnish with whipped cream, fresh lime slices, and lime zest.

key lime pie on white plate with lime zest shavings

Other desserts we love around here!

Here are some of our other favorite slabs…

Key Lime Slab Pie

This key lime slab pie is yummy and great for gatherings when you need more than a 9". It's sweet and tasty and will fly off the table.
Print Pin Rate
Course: Dessert
Cuisine: Southern
Keyword: lime
Prep Time: 55 minutes
Cook Time: 20 minutes
Total Time: 1 hour 15 minutes
Servings: 12 people
Calories: 580kcal
Author: Rachel Norman

Ingredients

Graham Cracker Crust

  • 3.5 cups graham cracker crumbs (about 25 whole graham crackers)
  • 3/4 cups butter plus 2 tbsp., melted
  • 1/4 cup brown sugar
  • 1/4 cup white sugar

Key Lime Filling

  • 3 cups sweetened condensed milk
  • 6 each egg yolks
  • 1 cup key lime juice
  • 4 tbsp lime zest grated and separated

Whipped Topping

  • 1 cup heavy cream
  • 1/2 cup powdered sugar
  • 1 tbsp lime zest

Instructions

  • Preheat oven to 350 degrees F. Spray 10 x 15 inch pan with baking spray, set aside.

Graham Cracker Crust

  • Pulse graham crackers in a food processor until finely chopped.
  • In a bowl mix together butter, graham cracker crumbs and sugar.
  • Press mixture into 10 x 15 in pan, use the bottom of a measuring cup to press the crust into the pan.
  • Bake the crust for 10 minutes, allowing the crust to cool completely.

Key Lime Filling

  • In a medium bowl combine sweetened condensed milk, eggs, lime juice, and 2 tablespoons lime zest.
  • Mix well, pour into cooled graham cracker crust.
  • Bake in a preheated oven for 10 minutes until small bubbles appear, DO NOT OVER BAKE. Pie should be slightly jiggly. (increase amount of time in small increments if needed).
  • Cool completely.

Whipped Topping

  • Whip heavy cream and powdered sugar together until stiff peaks form.
  • Garnish the top of the pie slab with the whipped topping and decorate with fresh lime slices and lime zest.

Nutrition

Calories: 580kcal | Carbohydrates: 76g | Protein: 8g | Fat: 28g | Saturated Fat: 16g | Cholesterol: 89mg | Sodium: 370mg | Potassium: 375mg | Fiber: 1g | Sugar: 61g | Vitamin A: 868IU | Vitamin C: 9mg | Calcium: 260mg | Iron: 1mg

Leave a Comment

Your email address will not be published. Required fields are marked *

*

Recipe Rating