- Preheat oven to 175°C and line a baking sheet with parchment paper. 
- In a large bowl, cream together butter, granulated sugar, and brown sugar until light and fluffy (about 2-3 minutes). 
- Add eggs and vanilla extract, mixing until well combined. 
- In another bowl, whisk together flour, cornstarch, baking powder, baking soda, and salt. 
- Gradually add dry ingredients to the wet ingredients, mixing until just combined. 
- Fold in chocolate chips, ensuring even distribution. 
- Scoop large dough balls (about ¼ cup each) and place them on the baking sheet, spacing them apart. 
- Bake for 10-12 minutes until the edges are golden but the center is still soft. 
- Let cookies cool on the baking sheet for 5 minutes, then transfer to a wire rack to cool completely. 
- Enjoy your bakery-style Crumbl cookies!