Preheat oven to 375.
Line muffin pan with paper liners (if you want to skip the liners, you can - just spray the muffin tins with non-stick spray)
Mix together flour, brown sugar and baking powder. Set aside.
Beat together eggs. orange juice, zest and oil.
Add wet ingredients into the dry ingredients just until moistened.
Fold in cranberries.
Spoon into prepared muffin pan.
Bake for 20 minutes or until golden brown.
Cool on a wire rack.