Preheat the oven to 400° F (200°C) and prepare muffin tins with either spray oil or cupcake liners.
Add the dry ingredients to a large mixing bowl.
In a separate container (I like to use a large measuring container) add the wet ingredients.
Stir the wet ingredients, then pour them into the dry mixture.
Stir with a rubber spatula or wooden spoon until all of the flour is incorporated, then stir in 1 1/2 cups of fresh blueberries.
Scoop out the batter and add it to the prepared muffin tins, filling them about 3/4 of the way full. Sprinkle a small amount of granulated sugar or coconut sugar on the top of each muffin. (This is optional, but it makes a nice sweet crispy coating at the top.)
Place the filled muffin tin in the oven and turn down the oven temperature to 375°F (190°C).
Bake for 18 minutes until slightly golden on the tops. Allow to cool for about 15 minutes before serving.
Notes
Wash the berries under cold water, then pat dry with a paper towel and if you are using fresh-picked berries. You don't want extra water on the berries.
Be sure to spoon-measure your flour, so you have an accurate measurement.
Make sure to preheat your oven to 400°F (200°C) and that it has reached that temperature before putting your muffins in the oven or they will not rise as much.
Make sure your baking powder has not expired, or it will not rise well and you will have flat muffins.