Pre-heat your oven to 400 degree and position rack in the middle.
DRY MIXTURE: In a large bowl, combine flours, walnut, baking powder, baking soda, salt and dried cranberries.
WET MIXTURE: In another bowl, lightly beat up the egg, add in brown sugar, then oil and milk, mix well.
Make a well on your dry mixture and gently add in your wet mixture, followed by the frozen berries. You batter will be slightly sticky.
Pour your mixture into a greased muffin tin. This makes 12 muffin.
Bake in the center of pre-heated oven for 20-25 minutes or until toothpick inserted in the center comes out clean.