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How To Make Frozen Spinach Cubes (for Green Smoothies!)

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Learn how to make Frozen Spinach Cubes that are perfect for green smoothies with this quick and easy recipe. They’re so simple, and they’re the perfect way to use up leftover greens!

This Frozen Spinach Cubes recipe is a lifesaver! Just puree some spinach and coconut water, freeze, and add to green smoothies whenever you'd like! |

A few weeks ago, I shared a quick vid on my Instagram story about blending up a bunch of leftover spinach into ice cubes for a week ahead of green smoothies. And all of a sudden –✨ poof ✨ — my phone blew up with questions.

“Whoa, how do you make those?”

“What else goes in there besides spinach?”

“How many do you add to a smoothie?”

“How long do they last?”

I tried to respond to as many of you as a could. But for anyone I may have accidentally missed — and anyone else out there today who might also be interested in some creepy-green-yet-life-changing frozen spinach cubes — I thought I’d pop in today and share how I make these little guys. They only take a few minutes to make, they’re the perfect use for leftover greens, and if you happy to love green smoothies as much as I do, they’re a total lifesaver.

This Frozen Spinach Ice Cubes recipe is my favorite addition to green smoothies! They're quick and easy to make, perfect for leftover greens, and delicious in smoothies! |

Oh, and the best thing about them? No recipe required. ?

Just toss a bunch of leftover fresh baby spinach (or whatever greens you love to add to your smoothies, like kale or Romaine or arugula or chard) in the blender. Then add in a generous splash of liquid (I prefer coconut water, with all of those natural electrolytes, but water would also do). And purée the mixture until it’s nice and smooth, adding in extra liquid as needed if it’s too thick.

Then pour the mixture into some ice cube trays. Freeze until solid…

Learn to make Frozen Spinach Cubes for green smoothies with this quick and easy recipe! It's the perfect use for leftover spinach, or any other favorite smoothie greens. |

…then voila! A delicious batch of spinach ice cubes will be ready to add to your smoothies!! I recommend storing them in a nice thick freezer bag. Then you can just grab a few whenever you’d like to use them!

Frozen Spinach Cubes are my favorite way to make a smoothie "green"! Just puree baby spinach and coconut water until smooth, freeze, and add to just about any smoothie. |

As far as portions go, I recommend starting with 1 or 2 per smoothie, then give it a taste and add more if you’d like. ? The amount of spinach in each cube will probably differ from batch to batch, depending on how thick your spinach mixture is. But after a smoothie or two, you’ll figure out what amount tastes good.

Learn how to make Frozen Spinach Cubes that will turn any smoothie "green"! |

So whether you happen to have a surplus of spinach in the fridge (common in my house, since I often buy it at Costco)…or if you have a batch of spinach on its last leg that you need to use quickly…or if you’re just looking for an easy hack to make more green smoothies…this recipe may just be a game-changer. :)

Happy freezing!

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How To Make Frozen Spinach Cubes (for Green Smoothies!)

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  • Prep Time: 3 minutes
  • Total Time: 3 minutes
  • Yield: 0 About 16 cubes 1x


Learn how to make frozen spinach cubes with this easy method!  They’re perfect for green smoothies, or any other recipe that calls for pureed spinach.


  • 5 ounces fresh baby spinach*
  • 2/3 cup coconut water (or water)


  1. Add spinach and coconut water to a blender, and puree until smooth.  If the mixture seems too thick, add in extra coconut water.
  2. Pour the spinach mixture into ice cube trays and freeze until solid.
  3. Use immediately, or transfer to a freezer bag and store in the freezer for up to 3 months.


*Feel free to substitute kale, Romaine, arugula, chard, or other greens you like to add to smoothies in place of spinach (or combined with spinach).

Prep time does also not include freezing time.  This depends on your freezer, but mine generally take about 4 hours to completely freeze.

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31 comments on “How To Make Frozen Spinach Cubes (for Green Smoothies!)”

  1. When I buy spinach on sale, after washed and dried, I toss one or two freezer bags full in the freezer, just as is. I got the idea from another blogger, and was amazed that the leaves actually stay separated, into frozen little leaf discs! Then I take out a handful or two, to use for smoothies, or toss in pasta dishes, etc.

  2. Even though neither my husband or I has been able to develop an appreciation for greens smoothies, I’m sure that some day I’ll have use for this technique. Thanks for posting it. And if you have a way of making green smoothies taste good to us, I’m all ears. We actually get plenty of veggies at lunch and dinner, so I don’t feel too bad about not doing green smoothies.

    • You’re welcome, Susan, we hope you guys can try it sometime soon! :)

  3. I don’t have a blender. Could I use a food processor to blend my greens instead, then put in the ice trays? Thanks!!!

  4. This is a wonderful idea! Thanks!

  5. I’m so excited to give this a shot! I was one of those people who blew up your phone :)

  6. This is an awesome idea!

  7. What’s the difference if I use coconut water with water. Does it feel strange?

    • Regular water would be fine. Coconut water is full of electrolytes and potassium, and has an authentic coconut flavor (it’s subtle when used in these smoothie cubes though).

  8. what a great idea! I never saw the original post that features these cubes, so happy to see this here!

  9. Love this! I’ve been doing this for a while. I add a whole bunch of broccoli and carrots as well and for the liquid I use the whey from making yogurt. We use these cubes in our daily fruit smoothie and you cannot taste the veggies at all!!

    • Thank you, Jen, we’re so glad you enjoyed them! :)

    • Im excited to try this, but have a question. Normally my hubby and I use fresh spinach/kale/chard mix, with yogurt, frozen fruit (like, 1/2 a banana and a 1/2C of cut berries or pineapple, etc), and water (or coconut water) in the blender. If im freezing the spinach/water mix, ill have to add even more water to blend it with the yogurt and frozen fruit, right? I mean, do you just put all the frozen things in the blender without more liquid? Thanks so much!

  10. I love this idea!! I’ve been searching for ways to keep spinach and other smoothie leaves from going bad before they get used!! This will be a time and leaf saver for sure!!

  11. Do you loose nutrition at all by blending to freeze then using later and again blending
    Into a smoothie?

  12. I am going to use this method to make Green Berry Popsicles for me and my kiddos. Thanks for the inspiration. I will certainly make cubes for my daily smoothie!

  13. I make ice cubes of olive oil and basil to preserve my fresh herbs for use during the winter. This works for so many fresh items.

  14. Thanks so much for the idea. I buy the big bag of spinach from Costco and normally freeze it into 25 baggies for smoothies. I hate that I am wasting so many baggies every month. This is a great idea, which will save baggies and freezer space! Plus it keeps the frozen aspect to my smoothies! I can’t wait to try it today!

  15. I used green juice about to expire- excellent idea!

  16. Works great! This dramatically reduced the amount of time it takes to prepare our morning smoothies. And it is saving us money because we aren’t wasting spinach.

  17. Been doing similar for a while. I use 2×8 square large Ice cube trays of silicon from Amazon. I use a Braun Shredder/Chopper and course chop Cabbage, Lettuce, Carrot, Peppers, Asparagus spear or 2, Romaine & Cucumber. I also put a little diced Ginger and Beetroot in the bottom of each tray. This way one signature veg does not overpower the smoothie. As long as they are all fresh and washed, no other water required. I aim to fill 16 and normally fill a few {4} extra small resealable “tupperware” containers. Press mixture down carefully with a fork and seal with the supplied lid. Have bought 2 more trays so I have 32 cubes which gives me about 2 weeks supply. My Nutribullet 900 handles the cubes and other frozen fruit, but if you get 1 or 2 out the night before and leave in fridge they should be soft for the next day. Happy Smoothies.

    • Your idea to take the cubes out the night before and leave them in the fridge is brilliant! I typically put frozen banana into my smoothies so I was concerned about add too many frozen items. Problem solved.

  18. I was just looking for a way to freeze my spinach to be able to use in smoothies. I didn’t think of this. Thanks.

  19. This is an awesome idea

  20. I just did this today! I added a cucumber for my liquid and a fresh lime. I used kale and spinach as my greens

  21. Been freezing fresh juice into cubes for years. I’m 70, hasn’t killed me yet.
    A couple of tips: If juicing spinach leaves instead of puree-ing them, you should probably also dilute with some water before freezing as the juice will be very concentrated.
    Also, buy the cheapest ice cube trays you can find as spinach and carrots will stain them badly.
    P.S. Spinach juice does not add or detract from taste, but it sometimes will color your smoothie into something that looks like it might have come out of the back end of a baby. But, if you’re a parent, it’s probably nothing you haven’t seen before : )