Creating the Sugar Cookie Cheesecake is straightforward. Follow these steps for the perfect dessert:

1. Preheat your oven to 325°F (163°C). Prepare a 9-inch springform pan by greasing it lightly.

2. Make the Sugar Cookie Crust: In a mixing bowl, combine flour, baking powder, and salt. Set aside. In another bowl, cream the softened butter and sugar until light and fluffy. Beat in the egg and vanilla extract until well combined.

3. Combine Mixtures: Gradually add the dry flour mixture to the butter mixture, stirring until it forms a dough.

4. Press the Dough: Evenly press the cookie dough into the bottom of the prepared springform pan. Use your fingers to smooth it out.

5. Bake the Crust: Place the pan in the preheated oven and bake for 12-15 minutes, or until the edges are lightly golden. Remove from the oven and let it cool.

6. Prepare the Cheesecake Filling: In a large bowl, beat the softened cream cheese with sugar and vanilla extract until smooth. Add the eggs one at a time, mixing well after each addition. Stir in the flour and sour cream until fully incorporated.

7. Pour the Filling: Carefully pour the cheesecake filling over the cooled sugar cookie crust, spreading it evenly.

8. Bake the Cheesecake: Return the springform pan to the oven and bake for 30-35 minutes. The edges should be set, but the center may still have a slight jiggle.

9. Cool the Cheesecake: Turn off the oven and crack the oven door, allowing the cheesecake to cool gradually for about 30 minutes. After that, transfer it to the refrigerator to cool completely for at least 2 hours.

10. Decorate: Once chilled, remove the cheesecake from the springform pan. Top it with whipped cream, sugar cookie crumbles, and sprinkles, if desired.