When I get to work in the morning, I fill up my water bottle, and make myself a bowl of oatmeal to take to my desk. I've been doing this for about a month, and I have seen a lot of recipes that are more complicated than they need to be.
To maximize my savings, I bought a 10 lb package of oats from Sam's Club. If you are unsure if you will use all 10 lbs, you may want to just start out with a smaller container of oats.
You only need 3 ingredients.
I don't really measure when I make a batch of oatmeal, but for you, I measured... Somewhat.
I use the Magic Bullet to blend the oats to a powder, and you can do this with as much of the oats as you want. I usually do 2 bullets to prepare for the week.
I put the powdered oats into a bowl and then distribute them into Ziplock sandwich bags, putting 1/3 of a cup in each bag, followed by 1 Tablespoon of Brown Sugar, and finally 1/8th tsp of Cinnamon.
And there you have it, your own instant oatmeal! I'm not sure about you, but I feel better about eating things when I know what is in it. Also, it is ridiculously cheap to buy the ingredients, and is a cost saver compared to buying the packets of instant oatmeal.