Green Thickie’s Overnight Oats: Filling Green Smoothie in a bowl

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Green Overnight Oats

Green Smoothie in a bowl

Green Thickies Overnight Oats Green Smoothie in a bowl

Happy Valentines Day!  To celebrate I’m bringing you something a bit different today.  Overnight Oats!  If you’ve never heard of overnight oats, it is a fantastic quick breakfast.  You basically mix your oatmeal/porridge ingredients in a bowl, leave it overnight and in the morning you have lovely soft oatmeal ready to eat straight away.

So I thought I’d go one step further and make green overnight oats so we don’t miss out on all our leafy green goodness.  This is a great breakfast for those who like to sit down with a bowl and a spoon and actually chew something.  It’s still quick to make, and quick to eat though so it’s great for a weekend or a change from Green Thickies.

Benefits of Overnight Oats

  • Breakfast is ready immediately in the morning, no more work to do.
  • Gives you something to chew.
  • It is a very filling breakfast so will keep you going all morning.
  • A nice relaxing sit down breakfast
  • Extremely healthy
  • Breaks down phytic acid contained in all grains, which makes them much easier to digest

Green Overnight Oats Green Smoothie in a bowl

Benefit of soaking grains

I’ve been reading a lot about the benefit of soaking grains lately and I have always tried to soak my oats before I use them.  I’m going to write more on this in the future, but I would recommend everyone soak their oats before adding to a smoothie especially if you have problems with digestion.  For overnight oats, your oats soak overnight in the fridge which is much better for you.

Another way to ‘soak’ your oats for your smoothie is simply to make your green thickie as normal then leave your green thickie in the fridge overnight.  Drink it in the morning and it will be a lot easier to digest and better for your health.  However some of the nutrients evaporate so you have to weigh up the pros and cons.  I always try and make my green thickies a day in advance as I like to have it ready immediately for my toddler and I as we are both hungry as soon as we get up.  I never have a problem digesting my green thickies, so if you do it might be worth giving that a try.

If you pre-soak your grains before adding them to your smoothie it will also make them easier to blend.

You can use any type of (plain) oats for your green thickie, but rolled (porridge) oats are better for your overnight oats as they will be soft enough to eat in the morning.  I’ve not tried overnight oats with any other type of oats yet.

Have you ever made overnight oats?  What are your favourite flavour combinations?  You can use any flavours for overnight oats, just replace the strawberries and mangos with anything you like.  

This breakfast is extremely filling as there is a double portion of oats, but you can make as much or as little as you like.  This recipe serves 2 and should keep for up to 3 days in the fridge covered.

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If the thought of a green breakfast doesn’t appeal to you, just make overnight oats without the greens to start with.

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Green Thickie’s Overnight Oats: Filling Green Smoothie in a bowl

  • Author: Katherine Natalia @ Green Thickies
  • Prep Time: 2 Minutes
  • Total Time: 2 Minutes
  • Yield: 2 1x
  • Category: Smoothie
  • Method: Blender
  • Cuisine: Drink


Green Thickie

  • 2 cups Dairy Free Milk
  • 1 cup Oats
  • 2 cups Spinach (Or other mild greens)
  • 1.5 Mangos (Or 1.5 Cups of Mango)
  • 1/4 cup Cashew Nuts (or Macademia nuts)
  • 1 teaspoon Vanilla Extract (Vanilla pod or Ground Vanilla)
  • 1/4 cup Date Paste (Dates, dried fruit or other healthy sweetener to taste)

Overnight Oats

  • 1 cup Rolled Oats
  • 2 cups Strawberries (Chopped)
  • 1/2 cup Mango (Chopped)


  1. Blend all the ingredients for the Green Thickie until smooth.
  2. Divide the green thickie, and the ingredients for the overnight oats between 2 large bowls.
  3. Cover and leave in the fridge overnight.
  4. In the morning you can eat it straight from the bowl. Some people like to warm their overnight oats slightly before they eat them to take the chill off them. You can also leave them to room temperature before you eat them.


  • This recipe serves 2 but you may need less than 1 serving to fill yourself up.
  • If you are new to Green Thickies and have more questions about making the perfect green thickie, please read this guide on How to make a Green Thickie.  Or read this guide on How to make a smoothie perfect every time.
  • Find out more about adding OATS or QUINOA to your smoothies.
  • The RECIPE for DATE PASTE can be found here.
  • Suitable for Special Diets: Gluten free (Use GF Oats or Quinoa), raw (Use raw oats/quinoa), vegetarian, vegan, dairy free, egg free, refined sugar free, wheat free, soya free (don’t use soya milk), salt free (don’t add salt), nut free (replace nuts with sunflower or pumpkin seeds. This doesn’t include coconuts)
  • * If you want to check if you can drink green thickies on your special diet,) please read this first. This will suggest some substitutions so you can still enjoy Green Thickies with ingredients you can tolerate.


  • Serving Size: 500 ml/ 1 pint/ 20 oz

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Katherine Kyle @ Green Thickies

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  1. Yum! I love overnight oats but I’ve been in full smoothie mode lately – Time to bring back an old favorite! :) Thanks for the inspiration as always.

  2. Oooo I like the idea of soaking oats in a smoothie! Genius :)

    • Thanks Gabby. I think it makes it much easier for me to tolerate, and I’m glad I make them a day in advance as don’t always remember to pre-soak my grains. As I use whole oat groats I don’t think I’d want to drink them straight after blending without pre-soaking in some way.

  3. These recipes look great! Have you done any with steel cut oats? I love those so much! Thanks for sharing!!

  4. I usually do this because I work 6 am in the morning and I always don’t have time to prepare for meal so I make it at night. Thank you so much for sharing! I’ll definitely try this tomorrow!

  5. I love overnight oats with lots of milk and berries! Its just the best breakfast for me and besides oats has helped me with my digestion problem.

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