Cocoa powder
A dry, acidic, starch-poor powder that behaves like a very thirsty flour — and whose pH decides which leavener a recipe needs.
Also called cacao powder (INTERNATIONAL) — Often marketed as less processed. In a batter it behaves as cocoa powder does.; baking cocoa (US); unsweetened cocoa (US)
Cocoa powder is what remains after most of the fat is pressed from cocoa solids. Three properties matter in a batter and none of them is flavour.
It is THIRSTY. Cocoa absorbs considerably more water than flour, which is why a cocoa cake made without adjusting the liquid comes out dry, and why adding cocoa to an existing recipe is not free.
It has almost NO STARCH and no gluten-forming protein, so it contributes essentially nothing structural. Replacing flour with cocoa weight-for-weight removes structure, which is why heavily cocoa’d cakes are fragile.
And it is ACIDIC — natural cocoa markedly so. That acidity is available to react with bicarbonate of soda, which is the whole basis of the natural-versus-Dutch question.
Composition and specification
Natural against Dutch-process
Natural cocoa is acidic — commonly around pH 5.5. Dutch-process cocoa has been treated with an alkali, which raises the pH to neutral or well above it and darkens the colour markedly. It also shifts the aroma rather than simply softening it. The difference is a real chemical one, and it changes what acid is available to a bicarbonate-based leavening system.
The processing difference and its direction on pH are uncontroversial. What BakeHQ deliberately does NOT claim is the popular rule that natural cocoa always requires bicarbonate and Dutch always requires baking powder — see the comparison for why that is too simple.
RecordedE. Sahin, F. D. Ceylan, A. B. Demirkoz, A. C. Karaca and E. Capanoglu, ACS Omega, Harold McGee, Scribner
What changes if it is left out
The bake loses flavour and colour, and gains back the liquid the cocoa was absorbing — so a recipe adapted by simply removing cocoa will be wetter than intended as well as paler.
Follows from the absorption property.
RecordedFollows from evidence recorded elsewhere on BakeHQ
Where BakeHQ stops and ChocolateHQ begins
This page is about cocoa and chocolate as things that go into a batter: what they absorb, what they contribute structurally, how they interact with leavening.
Tempering, melting technique, seizing and bloom are confectionery questions — about chocolate as a material in its own right — and they belong to ChocolateHQ. BakeHQ does not attempt them, and a future HEKNO Knowledge link between the two products is the right way to serve a reader who needs both.
Related
What it does
pH modification
Natural cocoa is acidic and Dutch-process is not, which decides what acid is available to a bicarbonate-based leavener.
Compared in
Natural vs Dutch-process cocoa
Both sides are cocoa; what differs is processing and pH, which is why the comparison points at one ingredient.
Competes for water
Hydration
THE EDGE THIS REPLACES SAID THE OPPOSITE. Sprint 7 removed a record claiming cocoa PERFORMS hydration, whose own note described it behaving like a very thirsty flour. It absorbs water; adding cocoa without adjusting the liquid is why cocoa cakes come out dry.
Used in
A small quantity — flavour, and historically part of the colour.
Commonly confused with
Substituting one for the other is a formulation change rather than a flavour change: chocolate brings fat and sugar with it and cocoa powder brings almost neither.
Keep reading
Dark chocolate
Substituting one for the other is a formulation change rather than a flavour change: chocolate brings fat and sugar with it and cocoa powder brings almost neither.
Every ingredient, by what it does
Grouped by function rather than by shelf, so a substitution question has somewhere to start.