Preheat oven to 425 degrees Fahrenheit (218 degrees Celsius).
Line a 13x18 inch rimmed sheet pan with parchment paper and coat lightly with cooking spray.
In a large mixing bowl, whisk together the Kodiak mix, milk, eggs, and vanilla extract until just combined.
Pour the batter onto the prepared sheet pan and spread evenly to the edges using a spatula.
Distribute blueberries and chocolate chips evenly across the surface of the batter.
Bake for 15 to 20 minutes, or until the top is golden brown and a toothpick inserted in the center comes out clean.
Remove from oven and allow to cool for 5 minutes before slicing into 8 rectangular portions.