Preheat the oven to 400 degrees Fahrenheit. Grease all 12 cups of your muffin tin with cooking spray.
In a large mixing bowl, combine 1 ¾ cups of the flour with the baking powder, baking soda, salt and cinnamon. Mix them together with a whisk.
In a medium mixing bowl, combine the oil and honey and beat together with a whisk. Add the eggs and egg white and beat well, then add the yogurt and vanilla. Mix well. (If the coconut oil solidifies in contact with cold ingredients, gently warm the mixture in the microwave in 30 second bursts.)
Pour the wet ingredients into the dry and mix with a big spoon, just until combined (a few lumps are ok). In a small bowl, toss the blueberries with the remaining 1 teaspoon flour (this helps prevent the blueberries from sinking to the bottom). Gently fold the blueberries into the batter. The mixture will be thick.
Divide the batter evenly between the 12 muffin cups. Sprinkle the tops of the muffins with eaw sugar. Bake the muffins for 16 to 19 minutes, or until the muffins are golden on top and a toothpick inserted into a muffin comes out clean
Place the muffin tin on a cooling rack to cool. You might need to run a butter knife along the outer edge of the muffins to loosen them from the pan. If you have leftover muffins, store them, covered, at room temperature for 2 days, or freeze leftover muffins.