You're going to fall in love with this Oat Milk Smoothie that tastes like a peanut butter milkshake! It's vegan, creamy, and made with simple ingredients like oat milk, peanut butter, frozen banana, and cinnamon.
This banana peanut butter smoothie is a healthy 5-minute breakfast idea that the whole family will enjoy.
Frozen ripe bananas and peanut butter are a match made in heaven!
Add some cinnamon, ground flaxseed, and old-fashioned oats to that and you have a sweet and delicious breakfast or snack.
Combine frozen bananas with oat milk, peanut butter, cinnamon, and coconut milk ice cubes to make this creamy smoothie. It tastes like a healthy milkshake!
Frozen Bananas: The main ingredient in this oat milk smoothie is ripe bananas. In order for this smoothie to be sweet and delicious, the bananas must be ripe and frozen. Freeze your bananas when they are starting to develop brown spots on the peel.
Peanut Butter: I used creamy peanut butter in this vegan smoothie recipe because peanut butter and bananas are a beautiful combo! If you have a peanut allergy, feel free to use almond butter or sunflower butter.
Old-Fashioned Oats: I added a few tablespoons of old-fashioned oats to this smoothie. Oats are a wonderful addition to smoothies to make them thick and more filling.
Ground Flaxseed: Ground flaxseeds are a great smoothie addition because it adds many health benefits and you can't even taste them! Make sure you purchase ground flaxseeds and not the whole flaxseeds.
Cinnamon: Cinnamon is optional but adds flavor!
Oat Milk: Oat milk is a wonderful base for smoothies because it's thick and creamy. I recommend using unsweetened oat milk instead of the ones with added sugar.
Frozen Coconut Milk Ice Cubes: This is my new favorite smoothie ingredient! It's full-fat canned coconut milk that has been frozen in an ice cube tray. It adds creaminess and makes your smoothie cold but without making it icy or watery.
You'll need a high-speed blender for this smoothie recipe. I use a NutriBullet Pro and it works beautifully to make creamy smoothies in no time!
In order to make the coconut milk ice cubes, I recommend these silicon ice cube trays.
How to Make This Recipe
This banana oatmeal smoothie recipe is so easy to make. Simply add all your ingredients to a high-speed blender and blend!
The full recipe can be found in the recipe card below.
Step 1: Freeze the ripe bananas overnight or for at least 3 hours.
Step 2: Whisk or shake the can of coconut milk until it's well combined. Pour the coconut milk into an ice cube tray and freeze until frozen.
Step 3: Add all the smoothie ingredients into a high-speed blender.
Step 4: Blend until smooth and creamy.
Step 5: Pour into a glass and enjoy!
Substitutions & Additions
I love this banana oat smoothie because of its creamy consistency, natural ingredients, and great flavor! It also happens to be incredibly customizable to what you have in your freezer and pantry already.
It’s dairy-free, plant-based, and can even be made gluten-free.
Banana: Replacing the banana in this recipe will change the overall flavor and texture. I wouldn't recommend leaving the banana out entirely but you could substitute one fresh banana with a cup of frozen fruit.
Oat Milk: Almond milk, soy milk, cashew milk, or any milk alternatives will work in this smoothie. You can basically use any plant-based milk or make your own oat milk.
Coconut Milk Ice Cubes: I enjoy the addition of the creamy coconut ice cubes but you can replace them with regular ice cubes and a spoonful of vegan yogurt. Coconut ice cubes will help yield a creamy texture without watering down the smoothie so if you have the time, I recommend it.
Peanut Butter: I enjoy peanut butter because it adds flavor so make sure you use a nut or seed butter alternative that you enjoy the taste of.
Ground Flaxseed: Chia seeds are a good alternative to flaxseeds but you can choose to leave them out as well.
Optional Add-Ins: Vegan protein powder, vanilla extract, pumpkin spice blend, chocolate oat milk, cocoa powder, or hemp seeds.
Tips & Tricks
This delicious, easy, and super creamy oat milk smoothie is perfect for a balanced breakfast or a healthy snack!
If your bananas weren't ripe enough you may need to add a bit of sweetness. I recommend 1 tablespoon of maple syrup or 1-2 pitted dates.
To make a thinner smoothie: Add more oat milk.
To make a thicker smoothie: Add a bit more frozen banana or another ice cube.
Make it gluten-free: You'll need to use certified gluten-free oat milk and oats.
Make it peanut-free: Use another nut butter or sunflower seed butter.
Storage & Freezing
This easy oat milk smoothie recipe makes 1 large serving or 2 small servings.
Storage: This banana smoothie can be stored in an airtight glass jar in the fridge- it's best served as soon as possible but can be enjoyed up to 24 hours after blending.
Freeze: Leftover smoothie can be frozen in an ice cube tray and blended when ready to enjoy.
Frequently Asked Questions
Make sure you are using an oat milk brand that is certified gluten-free. You can also use certified gluten-free oats to make homemade oat milk.
Oat milk is perfect for smoothies because it adds thickness and creaminess.
Soy milk or almond milk are great alternatives to oat milk.
Of course but ice cubes can create an icy texture instead of a smooth and creamy one. Using coconut milk ice cubes instead will make your smoothie thick, creamy, and cold but without adding that icy texture.
Oat Milk Smoothie
- 2 Frozen Bananas
- 2 tablespoons Peanut Butter
- 2 tablespoons Old-Fashioned Oats
- ½ tablespoon Ground Flaxseed
- ½ teaspoon Cinnamon
- Pinch of Kosher Salt
- 1 cup Oat Milk
- 3-4 Frozen Coconut Milk Ice Cubes see above
- Freeze the ripe bananas and coconut milk overnight or for at least 3 hours.
- Peel the bananas and freeze them in a freezer-safe container until frozen.
- Coconut Milk Ice Cubes: Whisk or shake the can of coconut milk until it's well combined. Pour the coconut milk into an ice cube tray and freeze until frozen.
- Add all ingredients to a high-speed blender and blend until smooth and creamy. To thin out the smoothie, add more oat milk. To make it thicker, add a bit more frozen banana or another ice cube.
- If your bananas weren't ripe enough, you may need to add a bit of sweetness. I recommend 1 tablespoon of maple syrup or 1-2 pitted dates.
- Pour into a glass and enjoy!
Disclosure: This page contains some affiliate links. Please know that I may receive a percentage or commission from a link included on this page, at no extra cost to you. I will only ever recommend a product that I have used and believe has substantial value to my readers.