Preheat the oven to 425 degrees Fahrenheit.
Line a 12 cavity muffin tray with liners and set aside.
In a large mixing bowl, whisk together all wet ingredients until smooth.
Add in the dry ingredients (aside from the chocolate and blueberries), making sure to spoon and level the flour, don't scoop from the bag.
Whisk until smooth. Fold in the chocolate chips and blueberries.
Let the batter rest for 10 minutes. This will help it thicken and will yield fluffier muffins. After 10 minutes, add to a lined muffin tray. I fill them pretty close to the top, then add more blueberries and chocolate chips.
Bake for 5 minutes, then decrease the temperature to 350 and bake an additional 18-22 minutes or until a toothpick comes out clean.
Let cool in the tray for 10 minutes, then remove and let finish cooling on a wire rack. Enjoy!