Grapefruit Green Smoothie

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Packed with fresh flavor and easy to make, this Grapefruit Green Smoothie is a hit with kids as well. The pineapple and grapefruit create the perfect amount of flavor to ‘mask’ the greens making this an easy way to add more fresh fruits and veggies. It’s naturally dairy-free and there’s no banana in this one either, just a touch of avocado for creaminess!

Three green glass jars of Grapefruit Green Smoothie with halved grapefruits on the side.

True story… I have gone through 30 pounds of grapefruit making this smoothie every day for a few weeks. It’s really that good! And just like most of my green smoothies, this one came around by chance.

I was getting low on groceries, but I still really wanted to make a green smoothie. I’ve been craving all things super fresh lately. So I used what I had on hand, even though I thought it might be a strange combo.

Two green glass jars of Grapefruit Green Smoothie with grapefruit slices around them.

It turns out pineapple and grapefruit is a great combination and my new favorite. Both pineapple and grapefruit are really awesome at cutting through any green flavor. Now lets jump right in and make this step by step!

Ingredients & Substitutions

Halved grapefruits, frozen pineapple, avocado, and spinach on a wooden cutting board.
  • Pineapple – frozen works best here so your smoothie stays cold and creamy. You can use fresh, but I would recommend adding some ice in that case.
  • Grapefruit – Is full of Vitamin C and antioxidants! I juice them using the glass juicer you’ll see in the photo below. But you can also use fresh grapefruit juice from the store. The advantage of juicing your own is you get way more pulp and fiber. I use pink grapefruit also known as ruby red grapefruit, but any grapefruit or citrus fruits like oranges, mandarins, etc. works here.
  • Avocado – adds both creaminess and a healthy fat to the mix in this smoothie. You can also use a 1/2-1 cup Greek yogurt here in place of avocado. Or any dairy-free yogurt works.
  • Spinach – is my preferred green in this green smoothie but you can use kale (to taste, it’s much stronger) if you’d like.

How to make this Grapefruit Green Smoothie recipe step by step

Juicing the grapefruit halves with a glass reamer or juicer bowl.

Step 1: Start by cutting the grapefruits in half and juicing them with a reamer. I recommend the ones like the above photo rather than the hand-held wooden ones because they’re easier and faster.

All the smoothie ingredients layered into a blender.

Step 2: Add the frozen pineapple, grapefruit juice, avocado, and fresh spinach to a high-powered blender.

Two green glass jars of Grapefruit Green Smoothie with a blush linen napkin folded on the side.

Step 3: Blend until smooth and enjoy right away for the best flavor.

Three green glass jars of smoothie with grapefruit slices on top.

Ways to serve this

  • I love this as an afternoon pick-me-up, or as a 1st/2nd breakfast. Since smoothies are on the light side, I’ll have a smoothie, then a couple hours later have a 2nd breakfast. It also makes a great grab-and-go kind of light lunch.
  • For breakfast or brunch alongside other things like my Sausage Hash Brown Breakfast Casserole, or Mexican Sweet Potato Breakfast Bowls.


Can I add protein powder to this smoothie?

Yes! You can add any protein powder you like the flavor of that is on the neutral side. For example, you wouldn’t want to add a chocolate protein powder here, but vanilla or plain would work well. I like to add Hawaiian spirulina to this smoothie.

Can I add a superfood to this smoothie?

I like to add Hawaiian spirulina to this smoothie. But barely grass juice powder or a sprinkle of bee pollen on top would be good as well. You can also add chia seeds or ground flax for added fiber. For more inspiration, check out my Superfood Smoothie Boosters post.

Are green smoothies good for weight loss?

Yes, they can be, and this is a common question! I have seen this play out 2 ways, I personally have lost weight drinking green smoothies. I’ve seen others that were looking to gain weight and be able to with green smoothies. By adding more fruits and veggies to your diet it can change your body composition for the better! (Not medical advice just anecdotal observations.)

Storing leftovers

  • To store – this smoothie is best right away but can be refrigerated for 4 hours or so.
  • Make ahead – have your greens washed and you can even juice the grapefruit the night before. That way you can make this smoothie in under 5 minutes.
  • To freeze – try making this recipe in a Freezer Smoothie Pack. Leave out the grapefruit juice and add it in fresh when you go to blend your smoothie. Also, you might need a bit more liquid when more ingredients are frozen.
Close view of one green glass jar of Grapefruit Green Smoothie with grapefruit slices around.

Tips & Tricks

Straight on view of 2 green glass jars of smoothie with grapefruit slices around.

I really hope you enjoy this Grapefruit Green Smoothie! If you do get a chance to make this recipe, I’d love to hear from you in the comments.

Two green glass jars of Grapefruit Green Smoothie with a blush linen napkin folded on the side.

Grapefruit Green Smoothie

5 from 1 vote
Author: Kari Peters
Total Time 15 minutes
Yield: 6 about 8 cups
Course: Smoothie


  • 4 cups fresh pineapple chunks - 1 1/4 pounds
  • 3 grapefruit - about 2 1/2 pounds
  • 1/2 ripe avocado - peeled and pitted
  • 4 cups washed baby spinach - 4 ounces


  • Place the pineapple chunks into a high powered blender.
  • Cut the grapefruits in half and juice them, discarding any large seeds. You will have about 1 1/2-2 cups average.
  • Pour the grapefruit juice over the pineapple, then add the avocado and spinach.
  • Blend until completely smooth.
  • Serve immediately for best flavor. This smoothie keeps well for up to 24 hours, so you can easily make it the night before and take it to work.
Bonus StepIf you made this recipe, please leave a rating/comment. Ratings really help us continue to bring you high-quality free recipes. Rate This Recipe!


1-2 small slices of fresh ginger are really tasty in this smoothie.
You don’t have to use the avocado in this smoothie but I like to use it for 2 reasons. The first being that healthy fats help you absorb nutrients better, and the second reason is that it helps the smoothie to keep for a few hours if necessary. Without the avocado the greens start to oxidize, and the flavor isn’t as good after 1-2 hours.
You can also sub in 1-2 cups orange juice to taste in place of the grapefruit juice.
Category: Smoothie
Cuisine: American
Keywords: Grapefruit Smoothie

nutrition facts

Calories: 140kcal | Carbohydrates: 30g | Protein: 2g | Fat: 3g | Saturated Fat: 0.4g | Polyunsaturated Fat: 0.4g | Monounsaturated Fat: 2g | Sodium: 18mg | Potassium: 486mg | Fiber: 5g | Sugar: 20g | Vitamin A: 3436IU | Vitamin C: 100mg | Calcium: 64mg | Iron: 1mg
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This recipe was originally published in 2016, but has been updated with nutritional information, tips, and new photos in 2022.

24 thoughts on “Grapefruit Green Smoothie”

    • This grapefruit smoothie does hold up pretty well for up to 1 day in the refrigerator compared to a lot of different combos I’ve tried, but I do have to say it always tastes better right away! I sure hope you enjoy it, and let me know if you have anymore questions!

  1. I’ve tried this combination for a smoothie it’s great, I love it. But if grapefruit is not available try limes lemons or star fruit, it adds a nice citrus tart sweet flavor as well.

    • Thank you for the great suggestions! I rarely find starfruit where I live but I’ll be on the lookout to give that a try as well. 🙂

  2. Hey, love this..What can one substitute the grapefruit with? Not, easily available in Nairobi Kenya.

    Tender Rose

    • Grapefruit has a unique flavor, but you could try oranges as well. I’m not sure what you have available, so maybe you could let me know what you have and I can try to figure out what would work best! 🙂

  3. Thought you might be interested in this…
    Mercola Lemon Curd Smoothie:

    ½ organic pineapple
    2 to 3 organic lemons
    1 banana
    2 avocados
    Handful of organic greens such as spinach or watercress
    1Tbsp. coconut oil

    Blend in blender.

  4. This looks delicious Kari! My husband’s captain just gave us a gaggle of fresh-picked grapefruit, and I’ve been looking for ways to use it all up. I might have to give this a try! 🙂

  5. I’m just loving all the green-ness of the smoothie if that makes any sense. So refreshing with the eye popping green. But my husband is a total sucker for grapefruit so I’ll be making this for him. Besides, maybe this smoothie will motivate him and I won’t have to nag him so much? Nah. Nevermind.

    • The grapefruit makes it really refreshing, so I hope you’ll enjoy it! I love the crazy green color too, I used to think green smoothies looked kinda gross until I tried one, and now I love the color!

  6. I really like the look of this one! I always want to buy pink grapefruits when I see them but I find them a little too sharp to eat on their own – now I’ve got a reason to pick some up!

    • I find the same thing sometimes that they can be a bit acidic/bitter depending on the batch. Sometimes the grapefruits I get can be quite sweet, but either way the pineapple really rounds it all out so I hope you enjoy it!


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