With a refreshing, summery flavor, these watermelon tequila lime bars are made with a baked crust topped with tequila watermelon jello and creamy lime topping.
Preheat oven to 350 degrees F. Line a 9×9 baking dish (or similiar size) with parchment paper or aluminum foil, extending pieces over the sides for easy handling. Spray inner sides and bottom with cooking spray. Set dish aside.
In a food processor, add vanilla wafers and pulse until completely crumbled.
Add crumbled vanilla wafers to a medium bowl, then pour melted butter on top. Use a fork to mix and mash until butter is absorbed.
Transfer crust mixture to prepared 9x9 baking dish and firmly press into an even layer, completely covering the bottom.
Bake crust for 15 minutes.
Transfer dish to a wire cooling rack to cool completely while completing the other steps.
For the Watermelon Layer
In a wide, microwave-safe bowl, add 1/2 cup of watermelon juice and lime juice. Sprinkle 4 gelatin packages over the juice (do not mix) and let sit for 5 minutes. Gelatin should be completely saturated.
In a large bowl, whisk together the remaining 3 1/2 cup watermelon juice, lime zest, tequila, and sugar together, then set aside.
Microwave the gelatin mixture for 30 seconds, then stir until gelatin is completely dissolved.
Pour the gelatin mixture into the larger bowl, then whisk to combine.
Place bowl in the refrigeratr for 15 to 20 minutes or until watermelon mixture begins thicken.
Remove watermelon mixture from refrigerator and pour over the cooled crust layer.
Place baking dish in the refrigerator until watermelon layer has firmly set, about 1.5-2 hours. Do not move forward with the next layer until the watermelon layer is set.
For the Creamy Lime Layer
In a large, wide, microwave-safe bowl, add the lime juice and sprinkle 2 gelatin packages over the juice (do not mix). Let sit for 5 minutes. Gelatin should be completely saturated.
Microwave the gelatin mixture for 30 seconds, then stir until gelatin is completely dissolved.
Whisk in sweetened condensed milk with the lime gelatin mixture, then set aside.
Using a stand mixer (or hand mixer + large bowl), add heavy whipping cream and beat on high until stiff peaks form, about 5-7 minutes.
Turn off mixer and use a spatula to gently fold the lime gelatin mixure in with the whipped cream.
Pour creamy lime mixture over the set watermelon layer, smoothing out the top. Sprinkle top with lime zest.
Place in the refrigerator until set, about another 1.5-2 hours.
Putting it all together
When ready to cut, lift dessert out of baking dish by gripping excess paper/foil along the sides, then transfer it to a work area. Peel back paper/foil from edges of bars, then cut bars into 1 or 2 inch squares.