Preheat oven to 350° and line a 12-count muffin tin.
In a medium bowl, whisk together the brown sugar, milk, oil, eggs, and vanilla until well combined.
Stir in the flour, baking powder, baking soda, and salt until just combined.
Stir in ½ cup of the chopped pecans.
Scoop the batter evenly into the 12-count muffin tin (about ¾ full). Top evenly with the remaining chopped pecans. Bake in the preheated oven for 20-22 minutes, or until a toothpick inserted in the centers comes out clean. Allow to cool, then serve!
Notes
** For protein muffins, use 1.25 cups whole wheat pastry flour and .5 cup vanilla protein powder. This will result in 8g of protein per muffin.