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My oatmeal smoothie is thick, creamy, and packed with a wholesome chocolate flavor. It’s the “all-in-one” breakfast- high in protein, fiber, and slow-releasing carbohydrates.
I used to think overnight oats were the most convenient breakfast. That is, until I discovered you can blend oats into smoothies.
When you blend oats with more traditional smoothie ingredients, you’re left with a thick, creamy oat smoothie that’s deceptively filling. The addition of cocoa powder seriously makes it taste like brownie batter. They’re quick to make and easy to customize. I can feed my family an oatmeal smoothie in the morning and know they won’t have hunger pangs until lunchtime.
Bonus? Oatmeal smoothies tick all the boxes. They contain slow-releasing carbohydrates from the oats, healthy fats and protein from the peanut butter, and tons of fiber from the chia seeds. You can even add protein powder to make it even more filling.
Table of Contents
Why I love this recipe
- Banana-free. Perfect if you don’t like banana smoothies.
- Thickshake texture. It’s like drinking my healthy milkshake.
- Customizable. I like to add superfoods or swap the nut butter, but you can modify this smoothie however you need to.
★★★★★ REVIEW
“I’m in love with this smoothie. It’s so delicious and keeps me full until 1 pm” – Julia
Key Ingredients
- Rolled oats. Quick oats can also be used, but I find the old-fashioned kind to have that extra staying power. Don’t bother using steel-cut oats, as they won’t blend down enough.
- Cocoa powder. I like adding a scoop of Dutch or dark cocoa powder for the rich, chocolate flavor. Skip this if you want a chocolate-free smoothie.
- Protein powder. A scoop (1/4 cup) of protein powder adds tons of protein and satiety. Opt for an unflavored or flavored protein powder of choice (I like vanilla casein).
- Maple syrup. Adds some sweetness without being overpowering. Honey or agave nectar also work, as do granulated sweeteners.
- Chia seeds. Thickens the smoothie and gives it an extra boost of fiber and omega-3 fatty acids.
- Creamy peanut butter or alternative. A spoonful of peanut butter adds tons of richness and helps keep you full for longer. Alternatively, try my low calorie peanut butter or almond butter.
- Milk. To blend. I prefer unsweetened almond milk, but use whichever milk you prefer.
How to make an oatmeal smoothie
This is an overview with step-by-step photos. Full ingredients & instructions are in the recipe card below.
Step 1- Add the ingredients to a blender.
Step 2- Blend everything until smooth. If the smoothie is too thick, add more milk.
Step 3- Pour the smoothie into glasses and serve immediately.
Oatmeal smoothie variations
- Taste as you go. I keep the maple syrup to a minimum, but add more if you prefer a sweeter smoothie.
- Thicken the smoothie. Add ice cubes or reduce the amount of milk.
- Add flavor boosters. Cinnamon, nutmeg, sea salt, and vanilla extract are some of my favorites.
- Nut-free. Swap the peanut butter for sunflower seed butter or tahini.
- Add fruit. Make a banana oatmeal smoothie by adding one frozen banana or a tropical oatmeal smoothie by adding frozen pineapple and mango.
- Add sneaky greens. I love to add a handful of baby spinach or kale for some sneaky hidden goodness.
Frequently asked questions
Yes, raw oats can be put directly in a smoothie. There is no need to cook them first, as the blender breaks them down.
Rolled oats or quick oats are best for smoothies. Steel-cut oats cannot be broken down and cannot be eaten raw.
Adding oats to a smoothie thickens it, makes it creamier, and gives it more staying power. Think of it as overnight oats in liquid form.
More healthy smoothies we love
If you’ve enjoyed my Oatmeal Smoothie recipe, please give it a star rating. It really helps others who are thinking of making it.
Oatmeal Smoothie
Equipment
- 1 Blender
Video
Ingredients
- 1/4 cup rolled oats
- 2 tablespoons cocoa powder
- 1/4 cup protein powder
- 1 tablespoon maple syrup
- 1 tablespoon chia seeds Can sub for ground flax
- 1 tablespoon peanut butter or any nut or seed butter
- 3/4 cup milk I used unsweetened almond milk
Instructions
- Add the rolled oats, cocoa powder, protein powder, maple syrup, chia seeds, peanut butter, and milk to a blender.
- Blend until smooth and creamy. If the smoothie is too thick, add more milk. If it is too thin, either add more oats or some ice.
- Transfer to a glass and enjoy.
Notes
- Add fruit. Bananas, berries, coconut, pineapple, etc.
- Chocolate-free. Omit the cocoa powder.
- Gluten-free. Use gluten-free oats.
- Vegan. Use dairy-free milk.
- Storage. While best enjoyed fresh, this smoothie can be stored in the fridge in a sealed container for up to 3 days. Stir it well before serving.
Nutrition
Originally published May 2023, updated and republished June 2025
I needed this. I always make overnight oats or oatmeal but never smoothies like this. Wow!
Yes. I made it and it passed muster with my DH. I made it with almond butter, almond milk, and carob powder. I added 1 tsp vanilla. Next time I might consider using 1 cup of milk. But it is very flavorful Will do again this week and try with strawberries and bananas, which are stored in the freezer. Thank you.
Can I use water instead of milk?
You can!
will def try!
thanx! 😊
I added 2 big handfuls of spinach and some double strength coffee, so good.
Yummy! This smoothie looks so refreshing. I can’t wait to give this a try.i love this healthy smoothie 🥤
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
This smoothie never fails! It’s so thick and flavorful, I really feel like I’m eating some dark chocolate dessert! And it’s healthy!?! I often skip the peanut butter for preference and half the recipe because it’s just too much food for me. Comes out amazing every time! Thank you for this perfect oatmeal smoothie recipe and introducing me to the world of oat smoothies
Instead of maple syrup, I use a banana (natural sweetener). This smoothie is delicious.
I had added a banana but did not think about eliminating the sweetener. I will do that next time.
I had also added collagen to mine.
I love adding collagen! 🙂
I just made this smoothie using peanut butter and monk sugar. So good. I never want to eat in the mornings, but now I have something to look forward to. I am going to try mixing all ingredients the night before so all I have to do is just blend.
Excellent
Have this every morning and DAYUMMMMMMMMM its as if the taste gets better and better! My whole family love it when I ask if they want some. Overall a huge 10/10. Best smoothie by far !!!
Yummy! This smoothie looks so refreshing. I can’t wait to give this a try.
Just made this with a spoon of PB2 instead of LSA mix and it was sooo delicious. Actually like batter!
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!
Oatmeal makes the BEST addition to smoothies; it adds that cookie dough feel.
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.
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!
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!