Formulation
How to Mask Pea Protein Off-Notes
A step-by-step development sequence for masking pea protein, covering isolate screening, blend design, dosing trials and how to run the sensory work.
September 10, 2026 · 4 min
Application
Protein Powder Flavor
The highest-volume masking problem in the industry.
By Priya Raman, Product Developer2 min read
How do you flavor protein powder?
The protein decides how hard it is. Whey needs a little covering. Pea and rice taste earthy and bitter, and need several fixes layered together — not just more flavor.
Protein powder is the biggest masking job in the industry by volume, and how hard it is depends almost entirely on which protein you picked.
The protein decides the difficulty
| Protein | What it tastes of | How hard |
|---|---|---|
| Whey concentrate | Mild dairy, slight cardboard | Easy |
| Whey isolate | Cleaner, a bit thinner | Easy |
| Casein | Thick, chalky in the mouth | Easy to moderate |
| Egg white | Sulfurous | Moderate |
| Soy | Beany, bitter | Moderate to hard |
| Rice | Chalky, cereal, gritty | Hard |
| Pea | Earthy, green, bitter, drying | Hard |
| Blends with greens or collagen | All of the above at once | Hardest |
Whey products are a flavoring job. Plant products are a masking job with a flavor on top. Treating them as the same brief is the most common mistake in the category — see plant protein masking.
How it mixes is part of how it tastes
A powder that clumps delivers concentrated lumps of unmasked protein straight to your tongue. Making the powder dissolve properly — usually with lecithin — and matching particle sizes across the blend often does more for the taste than any change to the flavor.
The same goes for separation. Fine flavor powder and coarse protein drift apart in transit, so scoops from the top and bottom of a tub taste different. Matching particle sizes fixes it, and it is a specification issue rather than a flavor one.
Sweetener and protein interact
Plant protein bitterness and stevia bitterness make each other worse, and both linger. Products in this category benefit more than most from a cleaner stevia grade or a blended sweetener. See stevia aftertaste.
Build the hard one first
Chocolate covers protein better than anything else, so a range developed chocolate-first produces a masking system that then falls over in vanilla, strawberry and unflavored.
Develop against vanilla, or better, against the plain base. It takes longer at the start, and it stops you launching a range where one product is quietly much worse than the others.
Coverage