Prep the pan: Line a 12-cup muffin tin with paper liners.
Heat oven to 325°F (163°C).
Make the crust: Pulse 1 cup graham cracker crumbs with 2 tablespoons sugar and a pinch of salt. Stir in 4 tablespoons melted butter until the mixture looks like wet sand.
Press and pre-bake: Divide crust among cups (about 1 heaping tablespoon each). Press firmly with the bottom of a measuring spoon.
Bake 5–6 minutes, then cool while you make the filling.
Beat the cream cheese: In a bowl, beat 16 ounces softened cream cheese on medium until smooth and fluffy, about 2 minutes. Scrape the bowl.
Add sugar and flavor: Beat in 1/2 cup granulated sugar, 1 teaspoon vanilla, 1–2 teaspoons finely grated orange zest, and a small pinch of salt until smooth.
Mix in sour cream and juice: Add 1/3 cup sour cream and 2–3 tablespoons fresh orange juice. If using, add 1/4 teaspoon orange extract.
Mix on low just to combine.
Add eggs gently: Beat in 2 large eggs, one at a time, on low speed. Mix only until just blended to avoid incorporating too much air.
Fill the cups: Divide batter evenly among liners, filling about 3/4 full.
Bake: Bake 16–19 minutes, until edges are set and centers still jiggle slightly. They will finish setting as they cool.
Cool gradually: Turn off the oven, crack the door, and let cheesecakes sit 5 minutes.
Transfer pan to a rack and cool to room temperature, about 45 minutes.
Chill to set: Refrigerate at least 3 hours, preferably overnight, for the best texture and flavor.
Whipped cream: Beat 3/4 cup cold heavy cream with 2 tablespoons powdered sugar and a splash of vanilla to soft peaks. Pipe or dollop on top before serving. Garnish with extra zest if you like.