What to put in a smoothie
Not a list of ingredients — a formula. Five roles, filled in order, with the amount for each. Learn it once and you never need a recipe again.
A liquid, frozen fruit and a creamy base, plus an optional boost and a flavor. About two and a quarter cups of ingredients in total, split roughly forty-five per cent liquid, a third frozen fruit and the rest base.
Every smoothie that works is the same five decisions, and every smoothie that does not is one of them missed. Too thin means not enough frozen; too thick means too little liquid; cold but unsatisfying means no base. Once you can name which role is missing, fixing a blend stops being guesswork.
The amounts below are the ones the ratio calculator uses, so this guide and the tool agree by construction. If what you want instead is to compare specific ingredients against each other, that is the ingredient list — this guide is how to assemble them.
1. Liquid — what gets it moving
Goes in first, before anything else. Without it the blades spin in an air pocket and nothing circulates. It is also the largest ingredient in the glass by volume, which makes it the biggest single lever on what the drink costs you — and the one most recipes gloss over.
About 1 of the 2¼ cups that go into one serving. 7 options fill this role.
Per cup (240 g), 0 g protein.
Per cup (240 g), 8 g protein.
Also worth knowing here: Oat Milk . The full list has every option for this role with the same figures.
2. Frozen fruit — what makes it a smoothie
The body and the chill in one ingredient. This is what separates a smoothie from a juice, and it is why every recipe on this site is built on frozen rather than fresh fruit — fresh brings the flavor but almost none of the texture.
About 0.75 of the 2¼ cups that go into one serving. 11 options fill this role.
Per cup (109 g), 1 g protein.
Per cup (124 g), 1 g protein.
Also worth knowing here: Frozen Mixed Berries . The full list has every option for this role with the same figures.
3. Creamy base — what makes it filling
Richness, protein and staying power. Skip it and you have a cold fruit drink that leaves you hungry an hour later; include it and the same glass behaves like a small meal.
About 0.5 of the 2¼ cups that go into one serving. 9 options fill this role.
Per 1/2 cup (122 g), 13 g protein. More on greek yogurt (nonfat, plain) →
Per 1/2 cup (40 g), 7 g protein.
Per tbsp (32 g), 4 g protein.
Also worth knowing here: Avocado . The full list has every option for this role with the same figures.
4. Boost — what fine-tunes it
A spoonful that changes the texture without adding volume. This is the one part of the blend the ratio model trades against the liquid — add a boost and two tablespoons of liquid come back out, so the drink thickens without getting bigger.
No share of the glass — it goes in on top of a finished blend. 6 options fill this role.
Per tbsp (7 g), 1 g protein.
Per scoop (30 g), 24 g protein.
Also worth knowing here: Hemp Seeds . The full list has every option for this role with the same figures.
5. Flavor — what makes it yours
Greens, spices and sweeteners. None of them takes up meaningful room, so the ratio model does not portion them at all — they go in on top of a finished blend rather than instead of something.
No share of the glass — it goes in on top of a finished blend. 15 options fill this role.
Also worth knowing here: Cocoa Powder (unsweetened) . The full list has every option for this role with the same figures.
The formula, assembled
One of each role, portioned by the ratio model. This is what the five steps above come to when you actually make them.
A worked example
1 cup almond milk · ½ cup frozen strawberry · ¼ cup frozen banana (sliced) · ½ cup greek yogurt · 1 tbsp chia seeds · 1 cup spinach.
The order things go in the jar
Liquid first so the blades catch. Soft things next — the base and any greens — and blend those smooth before the frozen fruit goes on top, so it falls into the vortex instead of sitting under the blade. Boosts and sweeteners last, pulsed briefly: over-blending seeds turns the drink gluey rather than thick.
When it comes out wrong
Too thin is a frozen problem, not a liquid one — add fruit rather than removing milk. Too thick is the reverse. Cold but unsatisfying means there is no base in it. Sour means the fruit was tart and nothing sweet was carrying it. Each of those is a missing role rather than a bad recipe.
Where to go next
The full database with calories, protein and sugar per serving — for comparing options rather than assembling them.
The formula here, run for your ingredients and your glass size.
Every fruit pairing finished six ways, with the amounts already portioned.
What each of these five decisions is worth once it is in the glass.
Build one now
Pick a liquid, a fruit and a base and the calculator portions them properly, with the calories and macros as you go.
Open the ratio calculatorEstimates, not advice. Every figure on this page is calculated from published per-100 g reference values and standard household measures, so your own brands, portions and equipment will move it. Nothing here is medical, nutritional or dietetic advice — talk to a qualified professional before acting on it, particularly if you are pregnant, managing a health condition, or feeding a child.