Preheat the oven to 350 degrees F. Line a baking sheet with parchment paper and keep it aside.
In a bowl, add flour, baking powder, baking soda, cornflour, salt, and mix. Keep this aside.
1 ⅓ cup All purpose flour, ½ teaspoon Baking powder, ¼ teaspoon Baking soda, 1 teaspoon Cornflour, ¼ teaspoon Salt
In another large bowl, whisk together butter and sugar until combined. To this, add egg and vanilla extract and beat it for a minute.
¼ cup Butter, ½ cup Brown sugar, 2 tablespoon Granulated white sugar, 1 Egg, 1 teaspoon Vanilla extract
Now add the dry ingredients (from above) and mix until just combined. Fold in chocolate chips and raspberries.
½ cup White chocolate chips, ¼ cup Frozen raspberries
Make 12 equal-sized balls and keep them a couple of inches apart on your baking sheet, as they will flatten/spread when baked.
Bake for 12 to 15 minutes or until golden brown on top. Transfer it to the cooling rack and let it cool completely.