Line a large baking tray with baking paper.
Heat the frozen blueberries in the microwave for 45 seconds or until super soft and jammy. Break up as much as you can with a fork and allow to cool for a few minutes.
Add the two sugars and melted butter to a bowl or stand mixer and whisk until it becomes paler and fluffier in its texture.
Add the blueberries to the bowl and whisk again for 1 minute then add the egg and whisk for a further minute. These are your wet ingredients.
In a seperate bowl add the flour, baking powder and salt and whisk to combine. Transfer this mixture into wet ingredients and fold/mix with a wooden spoon or spatula until combined.
Add the macadamia and white chocolate to the bowl and fold through then place the bowl in the fridge for 30 minutes to chill. This is a good time to preheat your oven to 160C
Once the dough has chilled, scoop about 10 cookie dough balls onto the baking tray. Optionally you can add a few extra blueberries and macadamia nuts on top (I avoid adding white chocolate on top as it will likely burn) and bake for 10 - 12 minutes until they're just starting to brown around the edges.
Allow to cool and enjoy!
