This keto smoothie recipe tastes great and provides good fats, lots of protein, and big flavor, all in one glass. Better yet, the recipe comes together in less than 5 minutes, and it’s sugar-free! It’s a great quick and filling breakfast or snack!

- Avocado — peeled and pitted. I like using Hass avocados as they’re more flavorful. Avocados are such a great addition as they are super creamy.
- Spinach or your favorite leafy greens — be sure to wash the greens beforehand, even if they’re advertised as pre-washed.
- Unsweetened coconut milk or coconut water –I think these are the two best liquids to use in a green smoothie recipe. You can use any dairy-free milk you prefer.
- Sugar-free vanilla protein powder — check out the recipe card down below for a link to my favourite one. You can also use a protein powder that contains monk fruit if you prefer.
- Peanut butter powder —I really love and highly recommend PB2. You can also add some flaxseed if you have it on hand.
- Freshly squeezed lemon juice — I don’t recommend using bottled lemon juice as there are preservatives.
- Optional berries – Since berries are lower in carbs, add some frozen or fresh strawberries or blueberries if you prefer.
- Top your smoothie with fresh mint and some blueberries.

I love this green smoothie recipe just the way it is, but here are some other low-carb ingredients you may want to add to your green protein smoothie.
- Kale
- Basil
- Microgreens
- Almond milk
- Flax seed
- Chia seeds
- Fresh or frozen berries
- Kiwi fruit
- Nut butter
- Flavored extracts, such as mint, vanilla, or almond
- Peanut butter powder
- Matcha powder
- Sugar-free Greek yogurt
- Fresh ginger and even turmeric to add extra flavor.
Tips to keep your smoothie fresh
The best time to consume this smoothie is directly after making it. Everything is still fresh, cold, and well combined.
However, if you want to drink it later, a protein green smoothie can be stored in the refrigerator for 24 hours. Store it in an airtight container, not your blender. Fill the container to the very top to keep any air out. Otherwise, the smoothie can pick up odors from nearby foods.
- Perfect Keto – This one is my favorite cause it’s gluten-free, dairy-free, and it uses clean ingredients. There are no junk fillers.
- Vega Sport Premium Protein – This one is dairy-free, vegan, and vegetarian too. It’s keto-friendly too because 1 scoop has only 5g of carbs.
- Vega Protein & Greens Vanilla – This is vegan too, and there is no soy. The flavor is good too. This is keto-friendly too because it 1 scoop has only 4g of carbs.
- Soy protein powder is good for your bones and is particularly helpful in older adults.
Be sure to check for unsweetened protein powder, as you don’t want to add artificial sweeteners and other fillers to the smoothies.

You can use fresh or frozen avocados and spinach for this green smoothie. It is definitely more budget-friendly and time-efficient to use frozen ingredients as you don’t have to wait for the avocado to ripen and risk the spinach going bad before the avocado ripens!
There’s no need to thaw the frozen ingredients before blending them, like in my Mango Green Smoothie or Easy Apple Smoothie Recipe. Some frozen fruit, like berries, is good to add to your smoothie. I love the mild sweetness of the berries, and they are low-carb friendly.
It’ll definitely keep your smoothie cool and make the smoothie thicker, making it the perfect refreshing summer drink.
- Peach Green Smoothie Recipe
- Pineapple Green Smoothie
- Pomegranate Green Smoothie
- Cherry Pineapple Smoothie Recipe
- Peach Carrot Smoothie Recipe

Low Carb Green Smoothie
Video
Ingredients
- 1 medium avocado peeled and pitted
- 1 cup spinach
- 1 1/2 cups unsweetened coconut milk
- 1 scoop of sugar-free vanilla protein powder I really recommend this one (It's my favorite and tastes really good)
- 1 tbsp peanut butter powder I really love and recommend this one from Naked.
- 1 tbsp freshly squeezed lemon juice
- 4 ice cubes optional
- Some mint leaves
Instructions
- Add all the ingredients to a blender and puree for about 30 seconds.
- Taste to adjust flavor and serve immediately.
Notes
- You can use frozen avocado instead of fresh avocado.
- The ice cubes will help the smoothie thicken. Skip them if you want the smoothie to be thinner.
Nutrition
Nutrition information is automatically calculated, so should only be used as an approximation.
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Can frozen avacado be used? Thanks!
Oh yes, avocados freeze brilliantly 😉
Many thanks…I have just signed up and found some awesome low carb smoothie recipes….gonna gave a look now at the recipe book….thanks again….Jane
You’re very welcome!
Are you using coconut milk that comes in a can or in a carton?
In a carton!
The smoothie looks so smooth! Thank you for the recipe! I will definitely try this very soon!
You’re very welcome.
Why wouldn’t you consider Vega protein keto friendly? I have been using it but needs to know if i need to stop it..
Vega protein has 4 gr of carbs. Please I would like to know why you don’t consider it keto. Thank you
You are totally right, Maria. This is a keto friendly powder and we just fixed that on the post.
Can I use peanut butter instead of powdered?
Yes you can!
how long will a smoothie last frozen to drink later?
About 3 months!
Does it taste OK with no ice? Most smoothies I see it says to add ice to the blender.
Yes it does if you use a milk that was in the fridge. You can add 3 cubes of ice if you prefer.
It’s delicious! Just wondering how to make a smoothie more filling.
Add more avocado. If you don’t follow low carb diet, you can add also a banana.
Hello! Would this technically have 0 net carbs? 7g Carbs – 7g Fiber = 0 net carbs
I am new at making smoothies, when you talk about coconut milk, is that in a carton or can?
It’ a carton.
Taste really bad!!!
This recipe tastes really good, but if you don’t use a good keto protein powder, it can alter the flavor of this smoothie.
I make this frequently and really enjoy it. On almost every smoothie I make I add an egg for extra protein. I may also add some carrots. Good stuff!
Thank you!