Lightly grease a 9”x13” casserole pan

Add your 8oz of softened whipped cream to a bowl and beat until smooth

Mix in the sweetened condensed milk, key lime juice, zest, and salt until combined

In a separate bowl, add your 1 cup of heavy whipping cream, ¼ cup powdered sugar, and 1 tsp of vanilla. Beat with a mixer until you have stiff peaks

Fold your whipped cream into your key lime mixture until combined

Place a single layer of graham crackers along the bottom of your casserole pan

Top with half of your key lime mixture, spreading into an even layer. Then add another single layer of graham crackers on top, smoothing the remaining key lime mixture over top. Pop in the fridge while you make your topping!

To make your whipped topping, add your remaining 4 oz of softened cream cheese to a bowl and sift in your 3 tbsp of powdered sugar. Beat with a mixer until smooth

Add in your vanilla and heavy cream and beat until fluffy. The goal is to have it fluffy enough to hold on the end of your spatula without running off

Spread your whipped cream in an even layer over the top, being careful not to swirl it into that top key lime layer

Cover your pan and store it in the fridge for at least 6 hours but ideally overnight. Before serving top with more lime zest and a sprinkling of graham cracker crumbs if desired!