# How to make protein coffee (proffee) at home

> Combining protein powder with coffee is simple in theory and easy to get grainy or clumpy in practice. Here is how to get it smooth.

By Joey Krosch. Published 2024-02-20, updated 2026-08-17.

Protein coffee, generally shortened to "proffee," is exactly what it
sounds like: coffee and protein powder combined into one drink, usually
iced. The idea is straightforward. Getting a smooth result without
clumping takes a bit of technique.

## Why it clumps, and how to stop it

Protein powder seizes when it hits liquid that's too hot or added too
quickly, which is where most home attempts go wrong. Two methods reliably
avoid this:

**Start cold.** Mix the protein powder with a small amount of cold water
first, into a smooth paste, before adding anything else. Let your coffee
cool to around 60°C to 70°C, then pour it in slowly while stirring
continuously.

**Use a blender.** Let your coffee cool for five to ten minutes first,
then blend it with the protein powder for 15 to 30 seconds on medium-high.
This is the more reliable method if you have a blender handy, it breaks up
any clumps mechanically rather than relying on temperature and patience
alone.

> **How much protein makes sense:**
> Most people do well with 20 to 30 grams of protein per serving, roughly
> one standard scoop. Much beyond 30 to 40 grams in one sitting is more than
> most bodies process efficiently at once, so there's little benefit to
> overloading a single drink.

## Three recipes to start with

**Classic vanilla iced coffee**: 60ml espresso, 30g vanilla protein
powder, 2 to 3 tablespoons of cold water or milk to make the paste, 120ml
milk, ice.

**Mocha powerhouse**: 60ml espresso, 30g chocolate protein powder, a
tablespoon of cocoa powder, 150ml milk, ice.

**Plant-based cold brew**: 120ml cold brew concentrate, 30g pea or soy
protein, 120ml pea milk, a quarter teaspoon of vanilla, ice.

For all three, make the protein paste first using either the cold-start or
blender method, then build the rest of the drink over ice.

## Why bother making it yourself

Pre-made bottled protein coffees are a genuine convenience, but making
your own gives you real control over protein type, sweetness level and
coffee strength, none of which you can adjust once a bottle is sealed.
It's also simply cheaper over time than buying it ready-made, once you
already have decent espresso or cold brew on hand.

## The takeaway

Proffee isn't complicated, the whole trick is avoiding clumps by
controlling temperature or using a blender. Get that part right and the
rest is just picking flavours you actually like.