Preheat oven to 325°F (160°C).
In a bowl, mix graham cracker crumbs, sugar, and melted butter. Press into a 9-inch springform pan. Bake for 10 minutes, then cool.
In a large bowl, beat the cream cheese and sugar until smooth.
Add eggs one at a time, beating well after each addition.
Mix in eggnog, flour, nutmeg, and vanilla until fully combined.
Pour mixture over cooled crust. Bake for 50–60 minutes or until center is set.
Turn off oven, crack door, and let cheesecake cool in oven for 1 hour.
Refrigerate for at least 4 hours or overnight.
Top with whipped cream and a sprinkle of nutmeg before serving.