Soothing Bath Salts

1 cup instant nonfat dry milk
1 cup baking soda
2 tablespoons cornstarch
1 tablespoon cream of tartar
1 tablespoon cinnamon
1 tablespoon powdered orrisroot
Perfume or essential oils, if desired

Combine all ingredients and store in a pretty container in the bathroom. Add a few sprinkles of the mixture under the water while filling the bathtub.