Whisk the dry and wet ingredients in two separate bowls. Pour wet into dry ingredients and mix until well blend but do not over mix. Pour batter into muffin pan (pretreated with cooking spray) or use foil liners and top with walnuts, if desired.
Bake at 375 degrees for 15 mins. If center is still soft, continue to bake for an additional 5-7 minutes, checking about every two minutes as ovens cooking times tend to vary. Let cool in muffin tins before removing the muffins. ⠀⠀⠀⠀⠀⠀⠀ ⠀⠀⠀⠀⠀⠀⠀ ⠀⠀⠀⠀⠀⠀⠀ ⠀⠀⠀⠀⠀⠀⠀ ⠀⠀⠀⠀⠀⠀⠀