Similar to Key Lime Pie and inspired by Carolina Lemon Pies, this Atlantic Beach Pie is a simple lemon-lime pie in a saltine cracker pie crust topped with whipped cream.
Using a food processor on high, grind 150g of saltine crackers into fine crumbs. This should make about 1½ cups of crumbs.
In a medium mixing bowl, combine the saltine cracker crumbs with 5 tablespoons of melted butter and 3 tablespoons of granulated sugar. Stir with a fork until the crumbs are evenly coated.
Press the mixture firmly into the bottom and up the sides of a 9-inch pie tin. The easiest method is to start by pressing the crumbs into the center, then working outward until they climb up the edges of the pan. A flat-bottomed measuring cup or glass can help pack the crumbs tightly and evenly.
Transfer the pie crust to the refrigerator to allow the butter to firm up while you make the Atlantic Beach pie filling.
Make the Atlantic Beach Pie
Preheat your oven to 325°F (165°C).
In a large mixing bowl, combine the sweetened condensed milk and egg yolks. Using a whisk or even a fork, mix until fully combined.
Add the lemon and lime juices, and once again mix until fully combined.
Pour the filling into your prepared saltine cracker crust.
Bake for 25 to 35 minutes, or until very tiny cracks begin to appear around the edges of the pie.
Chill the pie for at least 3 hours in the refrigerator so the filling can fully set before serving.
Finish the Pie with Whipped Cream
In a stand mixer fitted with the whisk attachment, combine the cold heavy cream, sifted powdered sugar, and vanilla extract. Whip on medium-high speed until stiff peaks form and the cream holds its shape.
Spread the whipped cream evenly over the chilled Atlantic Beach pie using an offset spatula or the back of a spoon. For a more decorative look, transfer it to a piping bag and pipe rosettes or swirls across the top.