Peanut Butter Oatmeal Shake

Well hello pretty! We’re counting down the days until spring here in Chicago and I’ve been dreaming of all my healthy smoothie recipes to sip on. In fact, my daily spring and summer breakfast is usually a smoothie or shake because it’s refreshing, no cooking required, and I can make it as healthy as I want.

For a few years I’ve been obsessed with recreating smoothies that taste like cookies. Because why the hell not? Do you remember my Tahini Snickerdoodle Smoothie? Everyone agrees that it totally tastes like a Snickerdoodle cookie. And now I’m here to reintroduce one of my favorite creations: peanut butter Oatmeal Shake…or smoothies. Call it what you will, but I liked the sound of Shake better.

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Top view of a peanut butter and oatmeal cookie shake

Ingredients for the Peanut Butter Oatmeal Shake

This easy, healthy peanut butter cookie shake is made with less than 10 ingredients you may already have in your fridge and pantry. Plus, it’s naturally sweetened without the banana! You need:

  • Medjool dates: I love dates as a natural sweetener in smoothies, shakes and desserts. You only need three and they pack a great fiber boost! Feel free to make just 2 if you prefer it less sweet.
  • Almond milk: Feel free to use any milk you like. I prefer unsweetened vanilla-almond milk, but coconut, cashew, or oat milk would also be super tasty.
  • Frozen Cauliflower: Yes, this oatmeal shake recipe has cauliflower in it! You get a nice boost of veggies but can’t taste the cauliflower at all. PROMISE!
  • Oats: for that delicious oatmeal flavor. I recommend using oatmeal or quick oatmeal and feel free to use gluten free. Don’t use steel-cut oats as they won’t mix properly.
  • Peanut butter: You’ll love the creamy peanut butter mixed with all of these ingredients. You can also use any other nut butter you like. Use the code AMBITIOUS15′ to get 15% off My favorite brand, Wild Friends!
  • vanilla extract: for a little extra flavor boost.
  • Cinammon: The hint of cinnamon really brings out the oatcake flavor.
  • Salt: A pinch of salt makes this taste AMAZING.

The result is a creamy shake that tastes like a peanut butter oatmeal with a sprinkling of sea salt on top. DAMN GOOD.

Ingredients for a healthy oatmeal shake in bowls

Optional peanut butter cookie shake nutritional boosters

  • Flaxseed Meal: This is one of my favorite ingredients that I add to shakes and smoothies for a little boost of fiber and minerals. It’s especially good for breastfeeding moms, as flaxseed can help increase milk production. One tablespoon is usually enough! Here’s a brand I love.
  • Chia seeds: Add a tablespoon of chia seeds for a boost of healthy fats and fiber.
  • hemp seeds: Feel free to toss in those hemp seeds lurking in your cupboard for a boost of healthy fats, omegas, and minerals.
  • Organic Spinach: If you want to bring more greens into your shake or smoothie, try adding a few cups of spinach. It can give the smoothie a slightly off-putting color, but you won’t be able to taste the spinach at all.
  • greek yogurt: Add a protein boost with a scoop of Greek yogurt (or your favorite non-dairy yogurt). You may need to reduce the almond milk to 3/4 cup in this recipe when adding yogurt.
  • Protein: Easily add more protein to a smoothie by adding some Greek yogurt or 1 scoop of your favorite protein powder. I recommend Vital Protein Collagen Peptides or Four Sigmatic Plant-Based Protein Powder.
  • cocoa powder: This would add a delicious, chocolatey flavor to the peanut butter cookie smoothie, along with a great source of antioxidants. I recommend 1 tablespoon.

Pour a peanut butter cookie shake into a glass

Tips for the perfect oatmeal shake

Here are a few of my favorite tips for making this oatmeal shake creamy and delicious:

  1. Use frozen products. Using frozen cauliflower will help keep the smoothie cold and thick. Sometimes ice cream doesn’t blend all that well, so it’s best to skip it unless absolutely necessary.
  2. Add liquid as needed. Don’t be afraid to add more liquid if your smoothie is too thick or doesn’t blend completely. High power blenders tend to blend frozen ingredients much better. So if you have a regular or personal blender, you may need to add more milk.
  3. Start at low speed. Start the blender on low speed and then gradually increase the speed to high to mix all the ingredients. Finish with the mixer on low speed.
  4. Have fun with toppings. Add your favorite toppings like extra peanut butter, a sprinkle of oatmeal, the mix-ins above, or a handful of homemade granola!

How to soften your dates

You will simply soak your pitted dates in 1 cup of warm water for at least 5 minutes. This will help them soften and ensure you can mix them into the shake easily.

Meal prep with this healthy oatmeal shake

Try making this vegan peanut butter cookie shake ahead of time to enjoy later! I have three amazing ways to make and store smoothies and shakes right in your freezer. You will learn the ice cube mold method, the Mason jar method and the freezer bag method. Get all my tips & tricks here!

Healthy peanut butter and oatmeal shake in a glass

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I hope you love this healthy peanut butter oatmeal shake recipe! If you make it, be sure to leave a comment and rating so I know how you liked it. Have fun, xo!

Oatmeal Shake with Salted Peanut Butter

Peanut butter and oatmeal shake in a glass

Deliciously creamy peanut butter oatmeal shake without the banana in just 10 minutes! This healthy, vegan oatmeal shake is naturally sweetened with Medjool dates and sneaky cauliflower veggies. Options to add your favorite protein powder and other delicious mix-ins.


  • For the date smoothie:
  • 3
    pitted Medjool dates (about ¼ cup packaged pitted Medjool dates)
  • 1
    unsweetened almond milk (or non-dairy milk of your choice) plus more to thin smoothie as needed
  • 1
    frozen cauliflower
  • ¼

  • tablespoon
    peanut butter (or 2 tablespoons powdered peanut butter)
  • ½
    vanilla extract
  • ¼
  • prize
    Salt (if your PB is unsalted)
  • Optional smoothie add-ins:
  • 1
    cocoa powder
  • 1
    Scoop up your favorite protein powder
  • 1
    flaxseed meal
  • 1


  1. First, soak your pitted dates in 1 cup of very warm water for at least 5 minutes. This will soften them and make them perfect for blending. While the dates are soaking, you can get all the other ingredients out, measure them out, and you’re done.

  2. Next, in a high speed blender, add all the ingredients: pitted dates, almond milk, cauliflower, rolled oats, peanut butter, vanilla extract, and cinnamon. Feel free to add optional add-ins to your smoothie if you like. Blend until smooth, adding more almond milk to thin it out if needed. Pour into a glass and enjoy! For 1 serving. Feel free to double the recipe for 2 servings.

recipe notes

Meal prep this shake: I have three amazing ways to make and store smoothies and shakes right in your freezer. You will learn the ice cube mold method, the Mason jar method and the freezer bag method. Get all my tips and tricks here!

To make a Chocolate Peanut Butter Oatmeal Shake: add 1 tablespoon cocoa or cocoa powder.

Feel free to use just 2 dates if you like a less sweet smoothie or shake!


Servings: 1 serving

Serving size: shake 1

Calories: 437 calories

Fat: 16.7g

Saturated Fatty Acids: 1.5g

Carbohydrates: 70.2g

Fiber: 12.6g

Sugar: 41.9g

Protein: 13g

Recipe by: Monique Volz // Ambitious kitchen | Photography by: Eat Love Eats

This post was originally published on July 5, 2021 and republished on March 1, 2023.

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