Preheat oven to 350°F. Line two baking sheets with parchment paper.
Beat softened butter, granulated sugar, and brown sugar for 2 minutes.
Add egg and vanilla. Beat until smooth, then scrape the bowl.
Whisk flour, cornstarch, baking soda, baking powder, and salt in a separate bowl.
Mix dry ingredients into wet ingredients just until combined.
Scoop dough into 24 balls and place them 2 inches apart.
Bake for 9-10 minutes, until edges are set and centers look soft.
Cool on the pan for 8 minutes, then transfer to a rack.
Crush freeze-dried strawberries and golden sandwich cookies. Stir with melted butter, sugar, and salt.
Whisk powdered sugar, milk, vanilla, and salt into a smooth glaze.
Glaze cooled cookies, press strawberry crunch topping on top, and let set for 15 minutes.
Use evenly crushed freeze-dried strawberries and Oreos. Press topping gently before baking. Add extra topping after baking for more crunch.