If you are an avid oat consumer, then you know there are so many different types of oats on grocery store shelves. While the world of Oat Types is vast (with so many different types of oats), today, we are covering the difference between old-fashioned oats vs. quick oats. This post will help you discover everything you need to know, including how they are made, their nutritional content, and their uses in the kitchen.

And if you want to learn more about oats, check out Steel Cut Oats vs. Rolled Oats, too.

A bowl of rolled oats and a bowl of quick oats from the top view.

What are Rolled Oats, and How are They Made?

Regular Rolled Oats, also referred to as Old-Fashioned Oats, Regular Oats, and Large Flake Oats, start out as whole oat groats with their husks (outer shell) still intact. Once the husk is removed, the oats are steamed, then rolled flat with heavy steel rollers (hence the name rolled oats), and dried in a kiln (thermally insulated chamber). Thickness varies depending on brand and manufacturing, but the general process remains unchanged.

The beauty of rolled oats is that the drying process contributes to their mild flavor and stabilizes the healthy oils in the grain by deactivating an enzyme that can cause the oats to spoil. This creates a longer shelf life, usually, about 6-9 months once opened, making them a staple pantry ingredient for many.

What are Quick Cooking Oats and How are They Made?

Quick Oats (Quick-Cooking Oats) start out just like rolled oats. They are the whole oat kernel with the husk intact. Once the husk is removed, the oat kernels are steamed for a longer period of time, then rolled thinner. The thin oat flakes are then cut into smaller pieces.

The thinner and smaller oats create a greater surface area, resulting in less time on the stove.

Showing the difference between quick oats vs old fashioned oats vs instant oats by displaying each type of oat in a bowl.

Quick Oats vs. Instant Oats

Now, at this point, you might ask; Are quick-cooking oats and instant oats that I see on the shelves of my local grocery store the same?

The answer is no. Instant Oats are not the same as quick oats. Instant oats take processing a step further. They are quick oats that are precooked, dried, and then cut into even smaller pieces. Instant Oats are ready to eat after a 1-minute soak in hot water or zap in the microwave.

Additionally, most packaged instant oats brands sold in the markets today are geared toward people who are looking for a quick and easy breakfast. While there is nothing wrong with that, most of these individual-sized packaged instant oats are packed with sugars. So, it is best to read the ingredients label and decide whether or not it is the right option for you.

What is the Difference Between Rolled Oats and Quick Oats?

Rolled oats are steamed for a shorter period of time and rolled into larger, thicker flakes. Quick oats are steamed longer and rolled into thinner flakes, then cut into small pieces.

Because quick cooking rolled oats have a greater surface area, they can absorb liquid more quickly, which makes for a faster cook time and a softer texture. Rolled oats take longer to fully cook and absorb liquid.

Old fashioned oats and quick oats in small bowls with text on the image.

Here are the differences in appearance, texture, and cook time broken down into a handy chart:

Type of OatLooks LikeTextureCook Time
Old Fashioned (Rolled Oats)Flat, oval flakes (thickness varies)Toothsome, Chewy, Texture8-12 minutes
Quick Oats(Quick Cooking Oats)Thin, small, irregular flakesSoft, Mushy1-2 minutes

Nutritional Comparison

The nutritional value of quick-cook oats vs. rolled oats varies based on manufacturing. However, in general, both types of oats are nutritious whole grains that are high in antioxidants, fiber, vitamins, and minerals. According to Nutrition Value, here are their key nutrition facts broken down in the table below:

Note: The nutritional values below are based on Bob’s Red Mills’ Rolled Oats and Quick Cooking Oats. Values will vary based on brand. As always, refer to your preferred nutrition calculator.

Nutrition Facts per 2 oz (56g)Rolled OatsQuick Cooking Oats
Protein7.4 g7.6 g
Carbs40 g40 g
Fiber6.3 g5.1 g
Net Carbs33.7 g34.9 g
Fat3.7 g3.8 g
Sugar1.1 g0 g

Old Fashioned Oats vs. Quick Oats Glycemic Index

According to the British Journal of Nutrition, researchers from Quaker Oats tested the Glycemic Index of 72 oat products. Based on their research, rolled oats have a glycemic index of 53, while quick-cooking rolled oats have a glycemic index of 71.

If you are not familiar, the glycemic index measures how much a food spikes your blood sugar with a value between 0-55 being low, 56-69 being medium, and 70-100 being high.

It appears that rolled oats have a lower glycemic index, and quick oats can raise your blood sugar quicker because of their smaller size.

Keep in mind certain packages of quick oats also contain added sugars and salt. This will alter the nutrition information and glycemic index as well.

Can Old Fashioned Oats be Substituted for Quick Oats?

The answer truly depends on the recipe. Here are the best uses for rolled oats and quick oats, along with some substitution suggestions:

  • Uses of Rolled Oats: Rolled oats are incredibly versatile and can be used in so many different applications. Some of my favorites include Cinnamon Apple Oatmeal, Almond Milk Oatmeal, Baked Oatmeal with Dates, Homemade Granola, and 5-Ingredient Granola Bars.
  • Uses of Quick Oats: Quick oats are smaller and cook faster, which alters the texture of many recipes. With that being said, if you don’t mind a few extra minutes of soaking time, you can get away with cooking them. I love to use quick oats in Homemade Muesli as quick oats quickly soften as soon as it interacts with liquid without having to cook them.
  • Substituting: Generally speaking, you can use rolled oats and quick oats interchangeably in healthy breakfast recipes like regular oatmeal or porridge, smoothie recipes, baked goods like Healthy Oatmeal Raisin Cookies, Pumpkin Oatmeal Muffins or Oatmeal Cookies, or homemade oat flour (made by processing oats in a food processor until they are pulverized.)
  • Overnight Oats: The only application where substituting quick oats for old-fashioned oats may not be the best idea is when making overnight oats with almond milk, Yogurt Overnight Oats, and Overnight Muesli, as quick oats break down too much and become too soggy. With that being said, in a pinch, you can use quick oats instead of regular oats in your favorite overnight oats recipe. The texture would be softer (and mushier), but it would still work.


Are rolled oats the same as oatmeal?

Rolled oats typically refer to the uncooked, rolled grain, while oatmeal is the porridge-like dish that results from cooking oats with milk or water and serving them (usually) warm in a bowl for breakfast. There is also instant oatmeal that is usually made with quick oats or instant oats.

Do you have to cook rolled oats?

According to Healthline, you do not have to cook rolled oats, and it is safe to eat rolled oats raw since they have already been heated during the manufacturing process. A great example of using raw rolled oats in a recipe is the popular overnight oats. It is made by soaking raw oats in milk for a long time, which not only helps make them softer but also improves digestibility and nutrient absorption.

Rolled oats vs. quick oats, which is healthier?

Nutritionally speaking, rolled oats and quick oats contain similar amounts of protein and fat, with slight variances in calories, fiber, and net carbs. And since they both come from whole oat groats, they have very similar health benefits, like being high in antioxidants and beta-glucan (the soluble fiber that helps lower the LDL (or bad) cholesterol and makes you feel full), which help reduce the risk of heart disease and type 2 diabetes. However, because of how they are produced, quick oats also have a higher glycemic index and fewer grams of fiber when compared to rolled oats. Therefore, rolled oats are considered healthier than quick oats.

About Aysegul Sanford

Hello Friend! I'm Aysegul but you can call me “Ice." I’m the cook/recipe-tester/photographer behind this site.

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1 Comment

  1. Good day; I, being a novice, am merely searching for the healthiest way to consume oatmeal to receive the maximum health benefits. Thanks to previous health conditions, I was comatose thirty days. I now have time to wait on things for health reasons. I am forced to be aware of chloresterol levels in my body.