Creating Classic New York Cheesecake can be an enjoyable experience when you follow these straightforward steps:

1. Preheat the Oven: Preheat your oven to 325°F (163°C).
2. Prepare the Crust: In a mixing bowl, combine graham cracker crumbs, ½ cup sugar, and melted butter. Stir until well combined.
3. Form the Crust: Press the crumb mixture firmly into the bottom of a 9-inch springform pan. Bake for 8-10 minutes, then remove and allow to cool.
4. Beat the Cream Cheese: In a large bowl, beat the softened cream cheese with an electric mixer until smooth and creamy—about 2-3 minutes.
5. Add Sugar and Vanilla: Gradually add 1 cup of sugar and 1 teaspoon of vanilla extract, mixing until well incorporated.
6. Incorporate Eggs: Add the eggs one at a time, mixing just until blended after each addition.
7. Blend in Sour Cream and Lemon Zest: Mix in the sour cream and lemon zest (if using) until fully combined.
8. Add Flour: Gently fold in the tablespoon of all-purpose flour, stirring until just combined.
9. Pour Filling into the Crust: Pour the cheesecake filling over the prepared crust, smoothing the top with a spatula.
10. Bake the Cheesecake: Bake in the preheated oven for 55-60 minutes. The cheesecake should look set but still slightly jiggly in the center.
11. Cool Gradually: Turn off the oven and crack the door open. Allow the cheesecake to cool in the oven for 1 hour, then transfer to the refrigerator.
12. Chill: Refrigerate for at least 4 hours, preferably overnight, before serving.

These clear steps will ensure that your Classic New York Cheesecake turns out beautifully!