Preheat the oven to 350°F. Line a 9x9 pan with parchment paper and set aside.
In a large microwave safe bowl, melt the salted butter.
To the bowl with the melted butter, whisk in the brown sugar and granulated sugar.
Once the sugars are mixed in, whisk in the eggs and grated carrots.
Next, add the flour, cornstarch, salt, cinnamon and white chocolate chips to the bowl and fold in with a silicone spatula until completely mixed.
Pour and spread the completed dough into the prepared pan.
Bake at 350°F for 45-50 minutes until the inside temperature reaches at least 190°F and an inserted toothpick comes out with a few moist crumbs on it.
Allow the blondies to cool completely before cutting. Enjoy!