Homemade Instant Oatmeal (Just Add Water)

This recipe started because I got tired of needing a full kitchen to eat well. When we went camping, all we wanted to bring was a stove, a pot, and a thermos, nothing else. Instant oatmeal fit that exactly. Boil water, pour it in, done.

It stuck around long after camping trips ended. These days it goes with us on road trips, comes along backpacking, and I always keep a full jar of it at home too, for mornings where I don’t have the time or the energy to actually cook. Anywhere we don’t have a full kitchen, this is what shows up.

Eventually I got tired of oatmeal being the only answer, though, however many flavors I came up with. That’s part of why I was so excited when we got our freeze dryer and figured out how to freeze dry eggs. Suddenly a stove, a pan, and water got us real scrambled eggs anywhere too, not just oatmeal. But oatmeal is still the one that started it, the recipe that taught me how little you actually need to eat well.

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Homemade instant oatmeal in a nutshell: Combine quick oats, salt, powdered milk, and a sweetener, add any mix-ins you like, and store it in a jar or portioned bags. When you’re ready to eat, add 3/4 cup of hot water, cover, and let it sit 5 minutes. No stove required beyond boiling water, and it stores for months.

Why Make This Instead of Buying the Boxes

Store-bought instant oatmeal packets are convenient, but the ingredient list usually tells a different story than the “wholesome breakfast” marketing on the front. A lot of sugar, artificial flavor, and very little actual oatmeal doing any of the work.

Making your own fixes that, but the bigger reason I keep making it is space. A box of a dozen individual packets takes up real pantry room for what amounts to maybe two cups of actual oats once you strip away the packaging. One jar of this mix takes up a fraction of that space and makes far more servings.

If you’re working with a small kitchen, moving often, or just don’t want your pantry taken over by cereal boxes, that trade-off adds up fast.

The Base Mix

Ingredients (per serving):

• 1/2 cup quick oats (or pulse old-fashioned oats in a blender for 5-10 seconds to break them down)
• 1/8 tsp salt
• 2 tbsp powdered milk or coconut milk powder, optional, for creaminess
• 1 tbsp powdered sweetener (I use homemade brown sugar, or skip this and stir in honey or maple syrup when you add water instead)

Combine everything in a bowl, then portion into an airtight container or individual bags at 1/2 cup per serving. Store somewhere cool and dry for up to 6 months.

To eat it: add 3/4 cup hot water, cover, and let sit 10 minutes.

Mix-Ins Worth Trying

Once the base is done, this is where it actually gets interesting:

• Cinnamon, nutmeg, or pumpkin pie spice
• Freeze-dried or dehydrated fruit
• Powdered peanut butter or almond butter
• Cocoa powder and chocolate chips
• Chia seeds or ground flax
• Shredded coconut, raisins, or dried cranberries
• Crushed nuts or seeds
• A scoop of protein powder or collagen, if you want it more filling for a hiking or work day

If you like the idea of a pantry that works no matter how small the kitchen is, I put together a free guide on building exactly that. It’s called the From-Scratch Pantry Starter Guide, grab it below.

Storing and Prepping Ahead

• Portion into individual bags or small jars labeled with the flavor and date, so mornings are truly grab-and-go
• Vacuum sealing or adding an oxygen absorber extends shelf life further if you’re prepping for longer-term storage
• A small basket or bin of a few different flavors means breakfast doesn’t feel repetitive even when you’re eating this most days

Frequently Asked Questions

Can I use old-fashioned oats instead of quick oats? Yes, pulse them in a blender for 5 to 10 seconds first to break them down closer to quick-oat size. Skipping that step will leave you with a chewier, longer-cooking texture, still good, just different.

How long does this last? Stored in an airtight container in a cool, dry place, up to 6 months.

Do I have to use powdered milk? No, it’s there for creaminess, not structure. Leave it out entirely, or swap in a dairy-free milk powder if that’s your preference.

Can I make a big batch instead of individual servings? Yes, just multiply the base recipe by however many servings you want and mix it all together before portioning. It’s easier to make one big batch of the base and add different mix-ins to individual portions right before eating, that way you’re not committing a whole batch to one flavor.

Final Thoughts

I can only eat so much oatmeal before I want something else, but this is still the recipe that taught me the real lesson: you need a lot less than you think to eat well, wherever you happen to be.

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These mixes store well in an airtight container and are easy to take with you when you move. Just grab a scoop and go. No freezer, no fridge, no bulky boxes.

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• Pantry System for Small Apartments
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FAQ

• Can I customize the flavor? Yes, add spices, dried fruit, or seeds to change the flavor without losing shelf stability.
• How long does this mix last? Stored in a cool, dry place in an airtight container, this mix will last 3–6 months.

If you want pantry systems that work in real life, especially in small spaces, rentals, or mobile living my From Scratch Pantry System walks you through what to store, how much to keep, and how to make food prep easier in any season of life.