Carrot oatmeal muffins

I have had this recipe for years and never used it.  The kids made it today and loved it!  

3 cups flour

2 cups oats

1 cup brown sugar

2 tbsp baking powder

1 tsp cinnamon

1/2 tsp salt

2 cups milk

1 tsp vanilla 

2 shredded carrots

Can replace shredded carrot with 2 apples pealed and grated or 1 cup raisins.

Bake at 350 for 15 min for mini muffins and 25 for regular sized.