High Protein Overnight Oats: One Jar, 26.9 g of Protein

One jar of these high protein overnight oats has about 26.9 g of protein and 398.5 kcal. Most of that protein comes from the Greek yogurt, not the oats. The jar weighs 380 g in total. Every line below is a gram weight priced from a USDA FoodData Central record, so you can check it. If you want more, 16 g of whey powder takes the jar to 39.4 g.

What goes into high protein overnight oats?

Five ingredients, one jar, no cooking. I picked a gram weight for each one and took the protein and energy per 100 g from the USDA records in the table, such as the rolled oats entry. The sums are mine.

Ingredient	Grams	Protein	Energy
Rolled oats, whole grain, dry	40 g	5.4 g	151.6 kcal
Greek yogurt, plain, nonfat	150 g	15.5 g	91.5 kcal
Whole milk, 3.25% milkfat	120 g	3.9 g	72.0 kcal
Chia seeds, dry	10 g	1.7 g	49.0 kcal
Blueberries, raw	60 g	0.4 g	34.4 kcal
Total	380 g	26.9 g	398.5 kcal

To make it, stir the oats, chia, yogurt and milk together in a jar and press the blueberries into the top. Close the lid and leave it in the fridge for at least 6 hours. Stir before eating. Each line in the table is a calculation like the one for the oats: 13.5 g of protein per 100 g × 40 g = 5.4 g. Use the same formula for any food you swap in: grams × protein per 100 g ÷ 100.

The record for the oats is the dry weight. Weigh them before they soak, because soaked oats are heavier and the calories are the same. By the USDA’s listing for regular oats, a cup is 81 g, so 40 g is a little under half a cup.

How much protein is in overnight oats, and where does it come from?

Oats and milk alone give 9.3 g of protein for 223.5 kcal in this jar, which is not a high-protein breakfast. The yogurt is what changes it: 15.5 g, or 57% of the jar’s protein. The oats supply 20%, the milk 15%, the chia 6% and the blueberries 2%.

That is also why the topping matters little for protein. Blueberries add flavor and almost none. Wraps and ramen work the same way: the base is a vehicle and the extras do the work, as high protein wraps and high protein ramen show. If your own jar comes out far below 26.9 g, look at the yogurt amount first.

The 2025–2030 Dietary Guidelines set 1.2–1.6 g of protein per kg, which is 84–112 g for a 70 kg adult, so this jar’s 26.9 g covers 32% of the low end. The other meals fill the rest, and how much protein you should eat a day shows how that range is built.

To get your own daily number from your height and weight, use the protein calculator. It applies the same 1.2–1.6 g per kg range and never goes below 60 g.

How can I raise or lower the protein?

Change one thing at a time and the table tells you what it costs. I worked each swap out from the same records.

Change to the jar	Protein	Energy
Base jar	26.9 g	398.5 kcal
Add 16 g whey-based protein powder	39.4 g	454.8 kcal
Add 50 g more Greek yogurt	32.1 g	429.0 kcal
Swap the milk for unsweetened soy milk	27.2 g	372.7 kcal
Swap the yogurt for 150 g of lowfat cottage cheese	28.0 g	433.0 kcal
Leave out the yogurt	11.5 g	307.0 kcal

The powder is the biggest lever. It lifts protein per 100 kcal from 6.8 g to 8.7 g, and it’s also the one swap that depends most on the product. The record I used is a generic whey powder with 78.1 g of protein per 100 g. Brands differ, so check your tub’s label and use its number.

Extra yogurt is the plainer route. It adds 5.2 g of protein for about 30 kcal, and the jar stays a food, not a shake. Soy milk barely changes the protein and removes 25.8 kcal, which suits a jar that already has plenty. Fruit hardly moves the protein either way: a 115 g banana in place of the blueberries gives 27.3 g and 465.3 kcal. If you want something hot, high protein waffles are counted the same way.

Do I weigh the oats dry or soaked?

Dry, since that is how the record describes them. Log the weight you put in the jar, with the state named: rolled oats, dry. A soaked jar can’t be weighed back into oats, and a cup measure gives a volume, not a weight.

I’d also weigh the yogurt rather than spoon it. A rounded spoon and a flat spoon are different amounts, and the yogurt carries more than half the protein, so it’s the one ingredient where a loose guess matters.

Who should skip the extra protein?

Anyone who has been given a protein limit. With kidney disease, your doctor sets the protein target, not a recipe. The same goes for pregnancy and for anyone under 18, because the figures here are written for healthy adults.

How long do overnight oats keep?

Plan on 3 days. The USDA says refrigerated leftovers keep 3 to 4 days. A dairy jar isn’t a leftover in the strict sense. It’s the nearest rule I know of, so I use the short end of it.

Calsa can keep your favorite jar as a recipe built from its ingredients, using raw or cooked weight, so the sum gets done once.