Ingredients
2 cans (14 oz) sweetened condensed milk
1/2 cup Key lime juice
2 tablespoons lime zest
3 3/4 cups cold heavy whipping cream, divided
1 teaspoon vanilla
27 full graham crackers
6 tablespoons sugar
1 teaspoon vanilla
INSTRUCTIONS
In a large bowl whisk together the sweetened condensed milk, lime juice and lime zest.
In a separate large bowl, beat 2 1/4 cups of the whipping cream and 1 teaspoon vanilla with a mixer on medium-high speed until soft peaks form. Fold 1/3 of the cream mixture into the sweetened condensed mixture, folding until combined. Then repeat two more times, adding 1/3 each time.
Layer the bottom of a 9 x 13 baking dish with the graham crackers, breaking some into smaller pieces if needed to fit.
Spread half of the cream mixture over the graham crackers. Cover with another layer of graham crackers and then spread remaining cream mixture on top. Top off with the remaining graham crackers. Set in the fridge while you whip the rest of the cream.
In a large bowl beat remaining 1 1/2 cups whipping cream, 6 tablespoons sugar and 1 teaspoon vanilla.
Spread over the final layer of graham crackers and cover with saran wrap.
Cover and refrigerate overnight