It is cheaper and more nutritious to make your own porridge. Have bags of organic whole grains on hand like millet, brown rice, or buckwheat groats, and grind up 3 tablespoons in your coffee grinder and add to 1 cup of water; keep stirring to prevent lumping and bring to boil; then lower to simmer for 3 to 5 minutes until desired thickness is achieved; this makes 1 portion. You are getting far more wholesome nutrients in fresh ground grains then with ground grains that have been sitting in a box for months/years on a shelf. Or if you prefer oatmeal stick to making steel-cut oats; however, these take longer to cook. Be sure to add your own favorite ingredients like almond milk, maple syrup, nuts, or cinnamon.
Whole grains contain valuable nutrients like fiber needed for optimum bowel function, B vitamins for brain function, anti-oxidants like vitamin E for immune function, and minerals like magnesium for stress reduction and iron for improving weakness and fatigue. From a traditional Chinese medicine standpoint starting the morning with a hot porridge in the winter is a very healthy habit and benefits the kidneys; check out this site and read the “so what to eat in winter” in the articles/how to stay healthy in winter section.