Line 2 baking sheets with parchment paper or silicone mats.
Whisk together cake flour, all-purpose flour, cornstarch, cinnamon, baking powder, baking soda, and salt. Set aside.
In a stand mixer or large bowl, beat cream cheese, brown sugar, cookie butter, butter, and granulated sugar for 3–5 minutes until light and creamy.
Add egg, egg yolk, and vanilla extract. Mix until combined.
Gradually add dry ingredients and mix just until combined.
Fold in chocolate chips and crushed Biscoff cookies.
Scoop dough into 14–16 balls and place on tray. Chill for 1 hour.
Preheat oven to 375°F (190°C).
Bake for 11–12 minutes until edges are golden and centers are soft.
Cool for 5 minutes on tray, then transfer to a wire rack.
Optional: drizzle with melted cookie butter and sprinkle crushed Biscoff cookies on top.