Preheat your oven to 350°F (175°C). In a medium bowl, whisk together the all-purpose flour, baking powder, and salt. In a large mixing bowl, cream together the softened butter and granulated sugar until light and fluffy, about 3-5 minutes. Beat in the egg and vanilla extract, then gradually mix in the dry ingredients until a dough forms. Wrap the dough in plastic wrap and chill for at least 30 minutes.

Once the dough has chilled, roll it out on a lightly floured surface to a ¼ inch thickness. Carefully transfer the rolled dough to a 9-inch springform pan, pressing it evenly across the bottom. Bake in the preheated oven for 12-15 minutes or until the crust is lightly golden. Remove the crust from the oven and let it cool completely in the pan.

Lower the oven temperature to 325°F (160°C). In a separate large mixing bowl, beat the softened cream cheese and granulated sugar until smooth and creamy, about 2-3 minutes. Gradually mix in the sour cream until combined, then add the eggs one at a time, beating well after each addition. Stir in the vanilla and optional almond extract, creating a smooth filling for your sugar cookie cheesecake.

Carefully pour the cheesecake filling into the cooled crust, spreading it evenly. Bake in the oven at 325°F (160°C) for about 55-65 minutes, or until the edges are set and the center is slightly jiggly. Keep an eye on it to avoid overbaking, as this can lead to cracks in your beautiful sugar cookie cheesecake.

After baking, turn off your oven and leave the cheesecake inside with the door slightly ajar for 1 hour. This gradual cooling helps prevent cracks. Once cooled, transfer the cheesecake to room temperature. Then, refrigerate it for at least 4 hours, or overnight, to allow it to set perfectly.

When you're ready to serve, carefully remove the cheesecake from the springform pan. Top it with an assortment of festive holiday sprinkles for a beautiful presentation. This sugar cookie cheesecake is not only a delightful dessert but also a stunning centerpiece that will impress your guests at any holiday gathering.