Individual key lime pies are simply brilliant to make at home. Mainly because the lime filling is tangy, sweet, zippy and fresh! When you get a bite of that with a creamy mouthful of whip cream mixed with just the right amount of powdery graham crust... Hmmmmmmmmm yeah baby! Pure delight!
Preheat oven to 300F and boil 8 cups of water in a kettle.
Whisk yolks with electric mixer until they are pale yellow and have increased 4x in volume.
Reduce mixer speed and slowly add 1 can of sweetened condensed milk, zest, and lime juice. Mix until well combined.
Divide filling between 4 small vessels. (Approximately 5 ounces in each.) Leave at least 3/4 inch at the top.
Create a water bath: put the vessels in a casserole dish in the oven. Do not crowd them. Carefully, without splashing, pour the boiling/steaming water into the casserole dish until it reaches 1/2 up the sides of the pies.
Bake for 8-12 minutes or until internal temperature of custards reach 145F
Pulverize graham crackers, sugar, and cinnamon in a food processor or in a zip lock with a mallet.
Slowly pour melted butter into cracker crumbs. Add just enough that it resembles damp sand, but is not soaked.
Whisk heavy cream, powdered sugar and vanilla until you get medium soft peaks.
Let custards cool completely. Then top with graham cracker crumbs, whip cream and lime zest.