Preheat the Oven: Preheat your oven to 350°F (175°C) and line a baking sheet with parchment paper or lightly grease it.

Prepare the Cookie Dough:

• Beat the softened butter, granulated sugar, and brown sugar together until light and fluffy, about 2-3 minutes.

• Add the egg and vanilla extract, mixing until fully incorporated.

• In a separate bowl, whisk together the all-purpose flour, baking powder, and salt.

• Gradually add the dry ingredients to the wet mixture, mixing gently until just combined.

• Fold in the blueberries.

Prepare the Cheesecake Swirl:

• Beat the softened cream cheese, granulated sugar, and vanilla extract until smooth and creamy.

Assemble the Cookies:

• Scoop 1.5 tablespoons of cookie dough onto the baking sheet, spacing each ball about 2 inches apart.

• Add a small spoonful of cheesecake mixture on top of each cookie dough ball.

• Use a toothpick or knife to swirl the cheesecake into the dough, creating a marbled effect.

Bake the Cookies:

• Bake for 10-12 minutes or until the edges are golden and the centers are set.

• Cool for 5 minutes on the baking sheet before transferring the cookies to a wire rack to cool completely.