Step 1

Preheat the oven to 350 degrees Fahrenheit.

Step 2

Place the sweetened condensed milk, sour cream, Key lime juice, and zest into a large mixing bowl. Mix it until just combined and creamy.

Step 3

Pour the pie filling into a pre-made graham cracker crust and place it in the oven.

Step 4

Bake it for 5-8 minutes or until the bubbles on the surface burst. The edges will be firm, while the inside will slightly jiggle.

Step 5

Cool it on a wire rack until it comes to room temperature. Once it's at room temperature, transfer to the refrigerator to set for at least one hour to overnight.

Step 6

Garnish it with fresh whipped cream before serving, and enjoy!