Oatmeal Smoothie


5 from 105 votes
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This oatmeal smoothie is thick, creamy, and packed with healthy and wholesome ingredients! Ready in seconds, it’s perfect for a fast and delicious breakfast.

oatmeal smoothie.

The best oatmeal smoothie

Ever enjoyed overnight oats? Well, oatmeal smoothies are essentially a thinner and drinkable version of them. 

I used to always be someone who’d make smoothies with fruit, which would naturally thicken a smoothie. However, I wanted to make ones without a banana. It’s not that I dislike bananas (hello banana bread and banana breakfast bars), it’s just I found I would always be hungry 5 minutes later!

Adding oatmeal to my smoothie not only gave it a thickness that a frozen banana would, but it kept me full for HOURS. It’s perfect for weight loss, and the added fiber and protein kept me going all morning. I’d sometimes forget it was lunchtime!

Oh, and you don’t need to pre-cook the oats, so you can add them in their raw state! 

By the way, don’t let the oatmeal fool you though- I promise you won’t taste it. Besides, the added cocoa powder makes this smoothie taste like brownie batter. 

Ingredients needed

You’ll love the simple ingredient list to make this recipe. Everything can be found at any grocery store and honestly, you probably have everything in your pantry as we speak. Here is what you’ll need: 

  • Rolled Oats. Also known as old fashioned oats, these give the smoothie added thickness, without the need for any banana. It also makes the smoothie EXTRA filling and hearty. 
  • Cocoa Powder. Adds some chocolate flavor, which is always welcome in the mornings. For a richer flavor, use dark or black cocoa powder. 
  • Protein Powder. Optional, but highly recommended if you’d like more staying power and extra chocolate flavor. 
  • Sweetener. You can use either a granulated sweetener (like coconut sugar) or a sticky sweetener (like maple syrup or agave nectar). Add as little or as much as you’d like. 
  • Chia seeds. Optional, but gives both an extra boost of fiber and nutrients, and added thickness. 
  • Peanut Butter or alternative. A spoonful or two of peanut butter or almond butter gives the smoothie a fabulous flavor and texture. Keep it nut free by using sunflower seed butter or tahini. 
  • Milk. To mix it all around! I used unsweetened vanilla almond milk, as I love the subtle vanilla flavor. The amount of milk is open-ended, depending on your smoothie thickness preference. 

How to make an oatmeal smoothie

Simply add all your ingredients into a high speed blender and blend well, until your desired texture is achieved. Give it a quick taste and add more sweetness, if desired. 

oatmeal smoothies.

Tips to make the best recipe

  • Oatmeal smoothies are incredibly forgiving. If your smoothie is too thick, continue to add more milk (or water) until your preferred texture.
  • For ultra-thick smoothies, you can add some ice. 
  • If you’d like a richer flavor, use canned coconut milk instead of the carton variety (we often do this with our carrot smoothie).
  • You can also use quick cooking oats if you don’t have rolled oats. I prefer the rolled kind as they have more staying power. 

Oatmeal Shake Variations

The beauty of this smoothie is just how easy it is to customize to your preferences or dietary restrictions. Here is what we’ve tested: 

  • Add protein. While oats contain some protein, you can really amp it up by adding a scoop (1/4 cup) of your favorite protein powder. I like either a casein or brown rice blend. 
  • Make it gluten free. Choose certified gluten free oats instead of standard ones. 
  • Cut the sugar. Try using sugar free maple syrup or a brown sugar substitute
  • Use different grains. Not a fan of oats? Use quinoa flakes or brown rice flakes instead. 
  • Change up the fruit. Like any good smoothie, this works with berries, pineapple, coconut, or anything else really. 

Storing and Freezing instructions 

To store: Sometimes I make a double batch of my oat smoothie recipe and store the second in the refrigerator, to enjoy as an afternoon snack.

If you intend to consume the smoothie on the same day, it will keep well for under 24 hours there. If you store it longer, you will need to re-blend it before consuming it. Refrigerated smoothies will keep for up to 5 days.

To freeze: As part of my weekly meal prep, I portion out a single oat smoothie serving and freeze it to have later in the week.

The night before I plan to have it for breakfast, I let it the smoothie block thaw at room temperature, and in the morning, I re-blend it. Frozen oatmeal smoothie blocks freeze well for up to 1 month.

More smoothie recipes to try

Frequently Asked Questions

Do you need to cook oatmeal before putting it in a smoothie?

There is no need to pre-cook your oats before adding them to a smoothie. The blender breaks them down nicely and makes them drinkable.

Is this good for weight loss?

With tons of protein, fiber, and slow releasing carbohydrates, this smoothie is fantastic for a weight loss diet. It’s also low in calories and filling.

Does blending oats destroy nutrients?

Blending oats does not alter it’s nutritional profile whatsoever.

oatmeal smoothie recipe.

Oatmeal Smoothie | Ready In One Minute

5 from 105 votes
This oatmeal smoothie is thick, creamy, and packed with healthy and wholesome ingredients! Ready in seconds, it's perfect for a fast and delicious breakfast.
Servings: 2 servings
Prep: 1 min
Cook: 1 min
Total: 2 mins



  • Add all your ingredients in a high-speed blender and blend until desired consistency. If too thick, add more milk.
  • Transfer to a glass and enjoy.


For a more filling and thicker smoothie, feel free to add a frozen banana or frozen berries.
TO STORE: If you store the smoothie in the refrigerator, for more than 1 day (24 hours), you will need to re-blend it before enjoying it. Refrigerated smoothies will refrigerate well for up to 5 days. 
TO FREEZE: Place smoothie in a small container and store in the freezer. Thaw smoothie block at room temperature, before re-blending. It will freeze for up to 1 month.


Serving: 1servingCalories: 138kcalCarbohydrates: 18gProtein: 12gFat: 3gSodium: 185mgPotassium: 188mgFiber: 5gCalcium: 224mgIron: 1mgNET CARBS: 13g
Course: Breakfast
Cuisine: American
Author: Arman
Tried this recipe?Give us a shout at @thebigmansworld or tag #thebigmansworld!

Disclosure: This post may contain affiliate links. I may earn a small commission for my endorsement, recommendation, testimonial, and/or link to any products or services from this website.

Arman Liew

I’m a two time cookbook author, photographer, and writer, and passionate about creating easy and healthier recipes. I believe you don’t need to be experienced in the kitchen to make good food using simple ingredients that most importantly, taste delicious.

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  1. Wait. Brownie batter that I can drink…for a meal? Sign me up for this one…like yesterday! *Queue Applause* Haha! So I am strictly a morning worker-out-er. Like you, if it doesn’t happen first thing, then it’s unlikely to happen at all. But if there is a promise of this oatmeal smoothie in there, then I might be convinced to wait until later in the day. I’m still recovering from that nasty cold, so the workout room in the basement has been mighty quiet lately…next week I’ll hit it again! But I won’t be able to wait until next week for this smoothie. That has to happen today!

  2. I’ve had very similar smoothies before and they are amazing. Especially after a good workout. Glad you’ve found one you’re excited about, that’s so awesome!

  3. A former boyfriend introduced me to oatmeal smoothies/milkshakes If they didn’t remind me of him so much, I’d probably make them all the time.

  4. I don’t think I could ever do just a smoothie for dinner. I like to eat, haha, so I think I would have to serve it up smoothie bowl style and top it with lots of texterous (not a word 😉 ) goodness. But I’m definitely not opposed to chocolate for so serve it on up!

  5. I’m in love with this smoothie every since my dash diet this smoothie is life due to me not eating breakfast but drink decaf coffee I stay full until 1pm and then it’s lunch time