Green hydration smoothie
Green, but not punishingly so. The apple is doing a lot of quiet work.
Green smoothies have a reputation problem, largely earned by people blending kale with water and calling it breakfast. This one is mostly cucumber and coconut water, both of which are already liquid, with just enough apple to make it taste like something you would choose.
It is also the highest-mineral drink on this hub that is not deliberately salted — the coconut water and the spinach between them deliver real potassium and magnesium.
How to make it
- Hands on
- 5 min
- Total
- 5 min
- Makes
- 2 servings
- Per glass
- 80 kcal
Ingredients
Method
-
Liquid first
Coconut water into the blender before anything else. Blenders struggle when you load the solids first — the blades cavitate and spin in a pocket of air.
-
Spinach next
Add the spinach and blend for 20 seconds on its own with the coconut water. Getting the leaves fully broken down first is what stops the finished smoothie being flecked and grassy.
-
Then everything else
Add the cucumber, apple, lime and ice, and blend for a further 45 seconds until completely smooth.
-
Taste
If it tastes green in the bad way, more lime. Acid is almost always the fix, not more sweetness.
Worth knowing
- Leave the cucumber and apple skins on. Both carry a meaningful share of the minerals and neither affects the texture once fully blended.
- Baby spinach only. Mature spinach is noticeably more bitter and mineral-tasting.
What it actually does for you
- Calories
- 80 kcal
- Sugar
- 10 g
- Sodium
- 125 mg
- Potassium
- 610 mg
- Magnesium
- 55 mg
The best mineral profile of any unsalted drink here, and around 90% water by weight. Coconut water supplies most of the potassium and magnesium; the cucumber and spinach add more. It is still light on sodium, so as post-sweat rehydration it wants a pinch of salt — but as a daily drink it is the strongest thing on this list.
How this was worked out: Summed from USDA FoodData Central: 240 ml coconut water (46 kcal, 600 mg potassium, 250 mg sodium, 60 mg magnesium), 200 g cucumber with peel (30 kcal, 294 mg potassium, 26 mg magnesium), 30 g spinach (7 kcal, 167 mg potassium, 24 mg magnesium), 150 g apple with skin (78 kcal, 16 g sugar, 160 mg potassium), plus lime juice — divided by two servings. Ice excluded.
Variations
- Swap the apple for half a frozen banana for something creamier and sweeter.
- Add a thumb of ginger for heat.
- Use plain water instead of coconut water to cut it to about 40 kcal a glass — you lose most of the potassium doing so.
Making it is the easy part
Remembering to drink it is the hard part. Honk watches your webcam with on-device AI and honks until you do, as gently or as loudly as you like.
Meet Honk → join the waitlistQuestions
Can you taste the spinach?
Barely, if you blend it into the coconut water first and use baby spinach rather than mature leaves. What gives green smoothies away is usually texture — flecks of half-blended leaf — rather than flavour. Blend for longer than feels necessary.
Is it as hydrating as water?
Close, and better in one respect. It is roughly 90% water by weight, and unlike plain water it carries about 610 mg of potassium and 55 mg of magnesium per glass, both of which help your body hold on to fluid. It also has 80 calories, which plain water does not.
