Preheat the oven and prep your muffin tin. Preheat the oven to 375°F. Line a standard 6 cup muffin tin with paper liners and spray the liners with non-stick spray.
Mix the dry ingredients. Whisk the flour, collagen powder, sugar, stevia, cornstarch, baking powder, and salt in a large bowl.
Mix the wet ingredients (separately). In a medium-sized bowl, whisk the milk together with the egg, olive oil, and vanilla extract until smooth.
Add wet to dry. Add the wet mixture to the dry mixture and mix with a large spoon until just incorporated. Don't overmix. Fold in the blueberries.
Fill the muffin tin. Distribute the batter evenly among the 6 muffin cups (a cookie scoop works well for this). Sprinkle the tops with turbinado (sugar in the raw).
Bake. Bake the muffins in the center of the oven for 16-19 minutes (17 is perfect for me).
Cool. Allow the muffins to cool for 3-4 minutes before removing them from the muffin tin to cool completely. Muffins taste best after resting for a couple of hours (if you can wait).
Enjoy!
Also, please let me know how you like the collagen blueberry muffins. Your feedback and star ratings mean so much to me. :)