Peanut Butter Banana Smoothie (like a milkshake!)

This Peanut Butter Banana Smoothie is a quick and healthy recipe that’s perfect for breakfast, or an easy snack on-the-go. I love how ice-cream like bananas become when you freeze them, so when you blend them together with peanut butter it’s almost like you’re eating a decadent milkshake, but with no added sugar.

peanut butter banana smoothie with banana slice on top

How to Make the Best Peanut Butter Banana Smoothie

You’ll need frozen bananas to make this recipe as written, so I recommend having a stash of ripe bananas ready-to-go in your freezer. When your bananas have lots of brown spots on them, make sure to peel them first, then place them in an airtight container with a lid and store them in your freezer to freeze overnight.

frozen bananas in container and peanut butter

I usually have 10-12 bananas stored in my freezer at any given time, because we use at least 1 each morning for our daily smoothies. If you don’t have a high-speed blender like my Vitamix, I recommend slicing your bananas into smaller pieces (before or after freezing them) so they will break down faster.

Once you have frozen bananas on hand, all you need to do is blend them with peanut butter (you can use homemade peanut butter if you like), flax seed, and a little liquid. I like to start with as little liquid as necessary needed for blending, so this smoothie will have a thick texture. You can always add more as needed!

Can You Use Overripe Bananas in Smoothies?

I don’t know about you, but when I have overripe bananas on my counter, my first thought is that it’s time to make Coconut Flour Banana Bread. (Or Banana Oatmeal Muffins!) If your bananas aren’t totally black and mushy, I think it’s fine to use them in smoothies.

Remember, the flavor of the banana will transfer to your smoothie, so you want to make sure the flavor of the bananas are still appealing to you. Bananas with lots of brown spots are perfect for smoothies, but if the skin is getting borderline-black in color, I’d use them for baking instead.

What Can I Put in a Smoothie to Thicken It?

I think the best smoothie recipes are nice and thick, with an almost milkshake-like texture. That’s why I use frozen bananas in this recipe instead of fresh ones, and that’s also why I like to add a spoonful of ground flax seeds to the mix.

You can buy a bag of ground flax seeds in most grocery stores, making it a convenient smoothie addition. Flax thickens when it’s mixed with liquid, without adding much flavor to the overall drink. Plus, you’ll be getting some omega-3 fatty acids and extra fiber in each sip!

Are Peanut Butter & Banana Good For You?

Peanut Butter and banana are a classic combination, and with good reason. Not only do their flavors compliment each other well, they also have some potential health benefits!

  • Bananas are a good source of fiber, so they are filling while being relatively low in calories. Bananas are also a good source of potassium, which is essential for kidney function, and may help to lower blood pressure and the risk of heart disease.
  • Peanut Butter is about 25% protein, so it contributes 8 grams of protein to this dairy-free smoothie. Peanut butter is a good source of monounsaturated fats, antioxidants, as well as nutrients like magnesium, folate, and vitamin E.

If you don’t mind your drink turning green in color, try adding a handful of fresh spinach to this peanut butter banana smoothie. It won’t change the flavor at all, but you’ll get even more nutrients into your day!

peanut butter banana smoothie ingredients in blender

What Other Fruits Go Well with Peanut Butter?

If bananas aren’t your favorite smoothie ingredient, you could make this smoothie with frozen strawberries or blueberries instead. It won’t be quite as sweet with only berries, so you might want to add a pitted Medool date or a tablespoon of honey for sweetness.

For a flavor variation, try my PB & J Smoothie or Chocolate Peanut Butter Smoothie!

How to make a Peanut Butter Banana Smoothie (1-Minute Video):

5 from 10 votes
peanut butter banana smoothie with banana slice on top
Peanut Butter Banana Smoothie (like a milkshake!)
Prep Time
5 mins
Cook Time
0 mins
Total Time
5 mins

This Peanut Butter Banana Smoothie tastes like a milkshake, but with no added sugar! It's a healthy breakfast or snack on-the-go.

Course: Drinks
Cuisine: gluten-free, vegan
Keyword: peanut butter banana smoothie
Servings: 1
Calories: 336 kcal
Author: Megan Gilmore
  1. In a blender, combine the water, banana, peanut butter, flax seeds, and vanilla. Blend until very smooth, stopping to scrape down the blender as needed. If you need a little more liquid, add it just 1 tablespoon at a time so the smoothie with have a thick, milkshake-like texture. (If you end up adding too much liquid, you can always add a handful of ice cubes to thicken it up again-- it will just dilute the flavor slightly.)

  2. Taste the smoothie and adjust any flavoring to taste. If you need a sweeter flavor, you can add one pitted Medjool date or a tablespoon of honey. Serve right away!

Peanut Butter Banana Smoothie Nutrition (for the whole batch): Calories: 336, Fat: 19g, Carbohydrates: 35g, Fiber: 7g, Protein: 11g

Recipe Notes:

  • This smoothie can be used as a meal replacement (especially if you add spinach to make it more of a liquid salad) or you can split the batch and serve it as a snack.
  • If you don’t like peanut butter, try using almond butter or sunflower seed butter instead.

If you try this recipe, please leave a comment below letting me know what you think! If you make a substitution, please share that, too. We can all benefit from your experience!

Reader Feedback: What’s your favorite smoothie combination?

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I saw that you posted this today and made it right away. Wow, it really is like a milkshake! So good, and guilt-free without the added sugar. Yum!!


I love your smoothie combinations. Your ratios are always spot-on! I thought 1/2 cup of liquid might not be enough for this smoothie, but it was perfect. (And my frozen banana was even pretty big!)


I make this smoothie with PB2 powder instead of peanut butter and it’s just as smooth and creamy minus the fat and calories. I also add spinach and use it as a meal on the go for busy days. Just found your blog and I’m loving all your content.

    Megan Gilmore

    Thanks for letting me know! Hope you’ll enjoy more recipes soon. 🙂

Jane Wolf

Love your peanut butter shake recipe. I can not do flax seed (or chia seeds). What else would you recommend? Thank you.

    Megan Gilmore

    It’s not necessary for the flavor, so you can leave it out or you could try an extra spoonful of peanut butter or a little avocado for creaminess.

claire Rowberry

Love this smoothie!


Delicious!!! I love it! Thank you!

Jen k

This is perfect as written! I want to drink it every day for the rest of my life 🙂


Loved this! I blended with unsweetened almond Malk & it turned out so creamy!




Delish! I used 12 oz of unsweetened almond milk & added non-flavored protein powder. Soo tasty – I love it!


I tried this smoothie and it was delicious and satisfying. I substituted coconut 🥥 almond milk 🥛 and I liked it. Is this substitution ok to achieve the goal we are working toward?


My daughter has a severe peanut allergy. Is there another butter we could try such as almond or cashew? I’m not sure how much it will affect the taste, but she loves smoothies. I would hate to chance it with peanut butter.

    Megan Gilmore

    Yes, almond butter or cashew butter should work great! I would prefer the cashew flavor, I think. Make sure you check the label on the back of the jar to make sure the nut butter you use isn’t processed in a facility with peanuts, just to be on the safe side.

Chickpea Express

This is probably my favorite flavour combo ever!! I agree, this peanut butter chocolate smoothie DOES taste like a milkshake! When I’m craving iced cream this is my go to smoothie!

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