01 - In a small bowl, mix cream cheese, granulated sugar, and vanilla extract until smooth. Scoop 18-20 small (1 tsp) mounds onto a parchment-lined plate. Freeze for at least 30 minutes until firm.
02 - In a large bowl, beat butter, brown sugar, and granulated sugar until light and fluffy. Add eggs and vanilla; mix well.
03 - In a separate bowl, whisk flour, baking soda, and salt. Gradually add dry ingredients to the wet mixture, mixing until just combined. Fold in chocolate chips.
04 - Gently swirl the blackberry jam into the dough — do not fully mix; visible streaks should remain.
05 - Scoop about 2 tbsp of dough per cookie. Flatten each portion slightly. Place a frozen cheesecake filling mound in the center, then cover with another tablespoon of dough. Seal edges to enclose filling. Place on a baking sheet, spacing cookies 2 inches apart.
06 - Chill the shaped cookies in the fridge for 15 minutes for best shape retention.
07 - Preheat oven to 350°F. Bake cookies for 12-14 minutes, or until edges are golden and centers are just set.
08 - Cool on the baking sheet for 5 minutes, then transfer to a wire rack to cool completely.