Preheat oven to 425 degrees. Pre-grease a standard muffin tin. Set aside
In a large bowl, add the flour, baking soda, collagen powder, and salt. Mix together.
Pour the wet ingredients to the dry and whisk to combine all ingredients. Add in chopped walnuts and whisk again.
With a tablespoon, scoop and pour batter into each muffin cup, fill with batter halfway to allow room to rise. Bake for 10 minutes or until you can smell the muffins. Let cool for two minutes.