Preheat your oven to 325°F (160°C). Line a 12-cup muffin tin with paper liners.
In a medium bowl, mix together the graham cracker crumbs and sugar. Pour in the melted butter and stir until moistened.
Spoon about 2 tablespoons of the graham cracker mixture into each muffin liner and press firmly to form a crust.
In a large bowl, beat the softened cream cheese and sugar until smooth and creamy.
Mix in the sour cream, eggs, vanilla extract, and salt. Beat until just combined.
Spoon the cheesecake filling evenly over the graham cracker crusts in each muffin cup.
Bake for 20-25 minutes, or until the edges are set and the centers are slightly jiggly.
Turn off the oven and leave the oven door slightly ajar. Let the cheesecakes cool in the oven for about 30 minutes.
Remove from the oven and let them cool completely at room temperature. Refrigerate for at least 3 hours, or preferably overnight.
Once chilled, gently remove the Mini Holiday Cheesecakes from the muffin tin. Decorate and serve.