Flaxseed Protein Shake

by | Jan 14, 2022

Having a go-to smoothie is a must. That’s why I love this Flaxseed Protein Shake is filled with protein-packed ingredients like peanut butter, ground flaxseeds, and greek yogurt. It takes just minutes to make and will have you feeling energized throughout the day!

Flax Protein Shake

Are flaxseeds healthy?

Flaxseed is a powerful ingredient added into this protein shake You can consume the seeds themselves, but I like to eat them ground for easier digestion. They are a great source of heart-healthy omega-3 fatty acids, protein, and fiber.

Try throwing your ground flaxseed in customizable granola too!

Which peanut butter should I choose?

I am a peanut butter fanatic and eat it on the daily. Whether it’s in my morning oatmeal or blender hummus— I love how versatile and affordable this ingredient is. When buying peanut butter, make sure it doesn’t have any hydrogenated oil or added sugars. The only 2 ingredients on the nutrition label should be peanuts and a small amount of salt.

For example, I have a peanut butter made with hydrogenated oil and added sugar shown on the left compared to a natural peanut butter with only 2 ingredients and no added sugar shown on the right.

Comparing peanut butter nutrition labels

Is this flaxseed protein shake sweet?

The banana works as the primary sweetener in this smoothie but if you are looking for it to be a touch sweeter, feel free to add a date or two into the smoothie for a natural sweetener. I like to use also use dates in my banana bread and energy bites to add the necessary sweetness without any added sugars.

What is the consistency of this shake?

This flax protein shake is pretty thick. If you like it thinner, double the milk. So instead of adding 1/2 cup of milk, use 1 cup of milk 

Can you turn this into an flax smoothie bowl? 

Smoothie bowls are a thicker smoothie that’s transferred to a bowl and topped with ingredients. It’s super easy to turn this smoothie into an flax smoothie bowl! Follow the same recipe, but use half the milk so instead of adding 1/2 cup of milk, use 1/4 cup of milk for the smoothie bowl version. 

The best part about a smoothie bowl is adding over toppings. Try topping with more ground flax seed, sliced strawberries, and quinoa crunch granola. Try these 20+ other healthy smoothie bowl recipes too.

Flax Protein Shake 3

Customize with any add-ins of your choice

Like all my other recipes, this flaxseed protein shake is completely customizable. I typically like to add about 4 tablespoons of plain Greek yogurt to my smoothie but you can also swap this for another protein-packed ingredient like collagen peptides, protein powder, rolled oats, or chia seeds

Flaxseed Protein Shake

Flaxseed Protein Shake

Yield: 1 - 16 oz smoothie
Prep Time: 5 minutes
Total Time: 5 minutes

This Flaxseed Protein Shake is filled with the perfect mixture of protein-packed ingredients like peanut butter, ground flaxseeds, and greek yogurt. Customize it to your liking with ingredients of your choice.


  • 1 small ripe banana, frozen (about 1 cup)*
  • 2 tablespoons ground flaxseed
  • 2 tablespoons creamy peanut butter or peanut powder
  • 2 to 4 tablespoons of greek yogurt or other protein add-in of your choice, (collagen peptides, protein powder, oats, chia seeds)
  • 1/2 cup milk of your choice (dairy milk, almond milk, oat milk, etc)


  1. Add all ingredients to a blender and blend on high until smooth.
  2. Serve immediately or store in the fridge for up to 24 hours.


*If you don't have a frozen banana, use can use a fresh banana and blend in 1/2 cup of ice to the smoothie to make it cold.

Nutrition Information:
Yield: 1 Serving Size: 1 smoothie
Amount Per Serving: Calories: 410Total Fat: 22gSaturated Fat: 3gUnsaturated Fat: 19gSodium: 70mgCarbohydrates: 42gFiber: 9gSugar: 22gProtein: 22g

This is an estimate provided by an online nutrition calculator. Nutrition may vary depending on ingredients used. For more nutrition information, seek a professional registered dietitian's advice.

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Pinterest–Flax Power Protein Smoothie

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  1. Ruth

    Roughly how many grams of protein per serving please?

    • Mackenzie Burgess

      Hi Ruth,

      Thanks for the comment. I just updated this recipe to reflect the nutrition facts. This can slightly vary depending on what kind of milk or add-ins you use – but with using skim milk and greek yogurt, this smoothie packs in 22 grams of protein! Let me know what you think if you try this recipe 🙂


  2. sameena sharifa

    Hey, Can you tell me if it helps to gain or loss weight?

    • Mackenzie Burgess

      Hi there! As the recipe is written I would consider this a meal replacement smoothie — to either enjoy as a breakfast or another meal. If your goal is weight loss, consider adding less peanut butter or using peanut butter. If your goal is weight gain, consider adding a large banana, more peanut butter, and perhaps protein powder as the “protein add-in”. If you need more help creating recipes tailored to your goals, feel free to check out my Coaching + Cooking program 🙂 https://cheerfulchoices.com/coaching-and-cooking/




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