This smoothie isn’t a dessert—it’s a green kick for in-between meals: less sweet, more texture. The oat milk lends a natural sweetness that doesn’t cling, while matcha and spinach add a tangy note. The avocado makes it creamy without tasting fatty. Perfect for anyone who doesn’t want to drown their smoothie in sugar but still needs something to chew on.
Here’s what you’ll need for the Green Oat Milk Smoothie
200 ml oat milk (unsweetened)
1 handful baby spinach (approx. 30 g, washed and roughly torn)
1 ripe banana (peeled and broken into rough chunks)
½ ripe avocado (just the flesh, diced)
1 level tsp matcha powder (Japanese quality, not culinary-grade)
1 tsp honey (or agave syrup for the vegan version)
4 ice cubes (plus 2 for the glass)
1 pinch sea salt (optional, enhances sweetness)
The key to success
The trick is in the matcha: never add it dry to the blender—it’ll taste like dust. Always first stir it with a little liquid until it forms a smooth paste. And don’t over-blend: stop as soon as the ice cubes are broken up. Too much blending makes the smoothie watery and ruins the creamy texture of the avocado. For extra chill, add the 2 extra ice cubes to the glass before pouring—they’ll keep it cold for longer.
Variations
- Green Oat Milk Smoothie with Ginger — Add 1 cm fresh ginger (peeled and grated) to the other ingredients when blending. Gives a sharp note and has anti-inflammatory effects. Pairs especially well with matcha.
- Green Oat Milk Smoothie with Apple — Replace the banana with ½ green apple (cored and diced). Makes the smoothie fresher and less sweet, ideal for a lighter version.
- Green Oat Milk Smoothie with Protein — Stir in 1 tbsp unsweetened hemp protein or pea protein. Boosts protein content without dominating the taste. Great post-workout.
Frequently asked questions
Can I use frozen banana?
Yes, but omit or reduce the ice cubes. Frozen banana makes the smoothie thicker and colder, but too much can overpower the spinach flavor. Freeze at most half the banana.
Why does my smoothie taste bitter?
Either the matcha was of poor quality (culinary-grade often tastes bitter) or it wasn’t properly stirred. Always mix it with a little liquid to make a smooth paste before adding it to the blender. Over-blending can also release bitter compounds.
Can I prepare the smoothie in advance?
Yes, but store it in the fridge for no longer than 4 hours. The avocado oxidizes quickly and the smoothie will turn gray. Give it a quick shake before drinking. For on-the-go: pour it into a thermos to keep it from warming up.
What’s the best oat milk to use?
Unsweetened oat milk with a high oat content (at least 10 %). It should be creamy but not too thick—otherwise the smoothie becomes too heavy. Barista editions work well because they froth up better.
