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Peanut Butter Banana Oat Protein Smoothie

This Peanut Butter Banana Oat Protein Smoothie is made with just a handful of basic ingredients: Frozen banana, peanut butter (or almond butter), rolled oats, almond milk, protein powder, and chia seeds. A great way to drink your protein.

Peanut Butter Banana Oat Protein smoothie in a glass with peanut butter, oats, and chia seeds on top. Ready to drink.

Do you ever say to yourself, “I love banana bread so much, I could just drink it?” 

This may be an internal dialogue that is unique to me, but this peanut butter smoothie tastes remarkably similar to a slice of your favorite banana bread.

Aside from it’s addictive flavor, the best thing about this banana oat smoothie recipe is packed with healthy fats and protein for an excellent way to start the day. 

If you prepare it as written, it yields you a whopping 31 grams of protein. Choose your favorite protein powder for the biggest protein boost.

Plus, it is so versatile! You can change up the ingredients depending on your nutritional needs and your protein needs.

This healthy meal replacement protein smoothie comes together in seconds and contains everything you need for a post-workout recovery, or a meal replacement.

Let’s go over the simple ingredients and some options for customizing this healthy smoothie.

Ingredients for Banana Oat Peanut Butter Protein Smoothie:

Overripe Bananas: Pick very ripe bananas that have plenty of brown spots for the best results! If you are using room temperature bananas instead of frozen bananas, be sure to add a couple ice cubes to the smoothie so that it is nice and cold. 

Creamy Peanut Butter or Crunchy Peanut Butter: I use natural peanut butter or unsweetened peanut butter. You can also use peanut butter powder to keep the flavor but reduce the fat.

Milk of Choice: I use unsweetened almond milk, but oat milk, cashew milk, coconut milk, soy milk, or regular milk all work. To add more protein you can also use Greek yogurt for a portion of the liquid.

Rolled Oats or Quick Oats: Oats are highly satiating, which is why I love adding them to smoothie recipes. I like my smoothies to be filling so that I stay full for a long period rather than getting hungry right away.

I also like that the oats provide more texture so that the smoothie has more of a banana bread vibe.

Protein Powder: Pick your favorite protein powder! I like using unsweetened unflavored goat whey protein, but any kind works.

If you use a flavored protein powder, I recommend vanilla, chocolate, or peanut butter flavored. For vegan protein, use pea protein or hemp protein powder.

Chia Seeds: Adding a boost of omega 3 fatty acids and some plant-based protein, chia seeds are an easy addition to any smoothie recipe. You can also add hemp seeds or flax seeds if you prefer.

Pure Vanilla Extract (optional): A splash of warm flavor comes with vanilla extract. If you don’t have it on hand, feel free to skip it.

Ground Cinnamon: I love adding  a dash of ground cinnamon for that banana bread vibe and extra flavor.

Toss in some pure maple syrup or chocolate chips for a more decadent dessert smoothie or shake.

This is not a low-sugar or low-calorie smoothie. But for those who like to begin the day with a filling smoothie, this recipe’s perfect for you. And for those of you who are looking for drinkable banana bread?

Even more perfection.

Banana Bread Oat Protein Smoothie in a glass with a yellow striped straw, ready to drink. Peanut butter, oats, and bananas in the background.

Let’s make it!

How to Make Peanut Butter Banana Oat Protein Smoothie:

Add all of the ingredients for the smoothie to a high-powered blender. Blend until completely smooth.

Taste the smoothie for flavor and if desired, add more cinnamon, ice cubes, or a splash or pure maple syrup to your personal taste.

Remember, you can customize this smoothie based on your palate and your nutritional needs.

If you love this smoothie recipe, you may also enjoy these healthy smoothies.

More Healthy Smoothie Recipes:

The perfect breakfast or midday snack, this peanut butter banana smoothie recipe is a great place to put ripe bananas and a great option for those looking to add more protein to their daily routine. 

Banana Bread Oat Protein Smoothie in a glass with a yellow striped straw, ready to drink. Peanut butter, oats, and bananas in the background.

Banana Bread Oat Protein Smoothie

A creamy, delicious smoothie recipe that is packed with protein for a healthy breakfast or midday snack. A great way to take in your protein!
Prep Time: 5 minutes
Cook Time: 0 minutes
Total Time: 5 minutes
1 smoothie



  • 1 ½ large ripe bananas, peeled and frozen
  • 1 Tbsp unsweetened peanut butter, or almond butter
  • 1 cup unsweetened almond milk
  • 1/3 cup gluten-free rolled oats
  • 2 scoops protein powder, vanilla, peanut butter or chocolate flavor recommended
  • 1 tsp chia seeds, optional
  • 1/8 to 1/4 tsp ground cinnamon, to taste
  • ½ teaspoon pure vanilla extract
  • 3 ice cubes


  • Add it all to a blender and blend well until completely smooth. Taste for flavor and add more almond butter and/or ground cinnamon to taste.
  • Note: the smoothie will become even thicker and more delicious as it sits on account of the oats. For best results, drink 3 to 5 minutes after preparing.


If you don’t like protein powder, you can skip it and add more chia seeds or more peanut butter, peanut butter powder, or use Greek yogurt in addition to your favorite milk.


Serving: 1SmoothieCalories: 564kcalCarbohydrates: 100gProtein: 31gFat: 9gFiber: 12gSugar: 97g
Course: Breakfast
Cuisine: American
Keyword: banana bread oat protein smoothie, healthy breakfast, peanut butter banana smoothie, peanut butter smoothie, protein smoothie, protein smoothie recipe, smoothie recipes
Servings: 1 smoothie
Calories: 564kcal
Author: Julia

This post contains affiliate links, which means I make a small commission off items you purchase at no additional cost to you.

Recipe Rating

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Thursday 4th of January 2024

How does this come out to 39g of protein? Can you gave a breakdown for what you use? I'm coming up with roughly 15g.


Saturday 6th of January 2024

@Julia, thank you! Glad I could help 😊 lol


Thursday 4th of January 2024

Hi there! Thanks so much for catching that - I had forgotten to add protein powder to the list of ingredients. I generally use 2 scoops of a vanilla protein powder. Still, when I re-calculated the macros I'm now getting 31 grams of protein instead of 39, so I'm not sure what brand of protein powder I was using back then to get the 39. Nevertheless, if you add in protein powder, it will bump up that protein count for ya ;)


Saturday 22nd of January 2022


Is this a good alternative for dessert for someone who is diabetic?


Monday 24th of January 2022

Hi Marisa,

I'm not a doctor, but based on my limited knowledge of Diabetes, I don't believe it would be a good fit. Fructose tends to spike blood sugar rather quickly and even though oats are a complex carb (slower burning), they raise blood sugar as well. I hope that helps! xoxo

Dr Martin Huang

Wednesday 18th of April 2018

Nice, can I premade this and leave it overnight for next day's consumption?


Wednesday 18th of April 2018

I would think you could make it the night before, but I think it'll taste best fresh :)

Joanne Bruno

Tuesday 10th of January 2017

Who has two too-ripe bananas sitting on her counter and NOW KNOWS HOW TO USE THEM!? I'm so excited.

Deborah Noyes

Thursday 5th of January 2017

I just made this smoothie this morning. It was excellent!


Thursday 5th of January 2017

I'm so happy you like it, Deborah! It's one of my favorites! :D

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