Creating these Ultimate Cheesecake Cookies is straightforward. Follow these simple steps:

1. Preheat the Oven: Begin by preheating your oven to 350°F (175°C). Line two baking sheets with parchment paper.
2. Make the Cookie Dough: In a large bowl, cream together the softened butter, granulated sugar, and brown sugar until light and fluffy.
3. Add Eggs and Vanilla: Beat in the egg and vanilla extract until well combined.
4. Combine Dry Ingredients: In a separate bowl, whisk together the flour, baking powder, baking soda, and salt. Gradually mix the dry ingredients into the wet mixture until just combined.
5. Prepare Cheesecake Filling: In another bowl, beat the softened cream cheese until smooth. Add the powdered sugar, vanilla extract, and sour cream (if using). Mix until the filling is creamy and well combined.
6. Assemble Cookies: Scoop a tablespoon of cookie dough onto the baking sheet. Press a small amount of cheesecake filling in the center, and top it with another tablespoon of cookie dough. Seal the edges to hide the filling.
7. Bake: Place the baking sheets in the oven and bake for 12-15 minutes or until the edges are golden brown. Cool the cookies on the baking sheets for 5 minutes before transferring them to wire racks to cool entirely.

Enjoy the aroma filling your kitchen as your cookies bake to perfection!