Preheat your oven to 400 degrees and prepare a 12-cup muffin pan by greasing with non-stick cooking spray
In a large bowl, whisk together brown sugar, applesauce, canola oil, egg, vanilla, and salt until fully combined
In a separate bowl, mix together flour, wheat bran, flaxseed, baking soda, and baking powder
Slowly mix the dry ingredients into the wet ingredients until barely combined
Mix in the milk until fully combined
Pour the batter evenly into the 12 muffin cups and bake for 11-13 minutes. To test doneness, insert a toothpick into the center of a muffin, and if it comes out clean, they are done.