Ensure the butter is softened at room temperature and cream it until smooth. Proper creaming prevents cookies from spreading.

Add powdered sugar and vanilla extract to the creamed butter and mix well.

Sift the cake flour and incorporate it into the butter mixture gently to avoid gluten formation.

Form the dough into a soft, cohesive ball.

Add crushed Oreos into the dough and mix evenly.

Use a scoop to portion the dough onto a baking tray.

Bake in a preheated oven at 180°C for 10-14 minutes. If using a top-heating oven, cover the cookies with foil to prevent over-browning.