Preheat your oven to 400° F. Prepare your muffin pan: line each well with a muffin liner or grease the inside of the muffin cups of the pan.
Place the blueberries in a small bowl and coat with the 1 tablespoon all-purpose flour. Toss gently to coat.
Prepare the Freeze-Dried Blueberries: Place the dried berries into a food processor and pulse until a fine powder forms, set aside.
For the Muffin Batter: In a medium-sized mixing bowl, whisk together the remaining flour, baking soda, baking powder, and salt. In a large bowl, stir together the sour cream, sugar, freeze-dried blueberry powder, eggs, melted butter, and vanilla extract. Mix until a smooth mixture forms.
Add the blended dry ingredients into the wet mixture a third at a time until just incorporated. It is important not to over-mix. Fold the fresh blueberries into the batter.
Scoop the batter into the prepared muffin tin, filling each cup ¾ of the way full.
Bake: Place the muffins into the preheated oven. Bake until golden brown and a toothpick inserted into the center comes out clean, about 20 minutes. Allow muffins to cool before eating.
Notes
This recipe is an adaptation of a blueberry muffin recipe from Simply Recipes.