日本語版

cocoa powder

ingredient / ingredient-cocoa-powder

ココアパウダー

Defatted and ground roasted cocoa solids. Sold as natural or alkalized products.

On this page (6 sections)
  1. Overview
  2. Sources for this overview (2)
  3. Topic hubs
  4. Related entries (9)
  5. Sensory (2)
  6. How processing and cooking change it (1)
↑

Reading the bitterness

Cocoa powder consists of defatted and ground roasted cocoa solids and is distributed as both natural product and product subjected to alkalization (the Dutch process). A study comparing before and after microwave-assisted alkalization chemically analyzed combinations of constituents responsible for bitterness and astringency.

In the same study’s Dose-Over-Threshold analysis, epicatechin, (-)-epigallocatechin gallate, luteolin, protocatechuic acid, theobromine, and caffeine were judged to contribute significantly to cocoa-powder bitterness (DOT>1). The constituents responsible for astringency partly differed, with syringic acid, p-coumaric acid, and 5-hydroxytryptamine among those playing important roles. Methylxanthines such as theobromine and caffeine appeared in this set alongside phenolic compounds, so they are not the sole bitterness-driving factors in this material.

Alkalization is positioned as an important cocoa-processing step for reducing bitterness, increasing solubility, and developing color. In a test applying different alkalization conditions for commercial cocoa powder to sponge cake, differences in treatment conditions affected batter properties and the cake’s color and texture, but the consumers’ overall evaluation itself was reported not to differ significantly by treatment condition.

These findings remain confirmed only at the level of abstracts or secondary summaries. Limitations include the source of the DOT-analysis thresholds and concentrations, the fact that receptor binding modes were based on molecular docking and simulation rather than human-receptor assays, and the fact that the alkalization study did not reach numerical sensory scores for bitterness itself.

Sources for this overview

  1. Bitter and astringent characteristics of alkalized cocoa powder: analysis using UPLC-Q-TOF-MS/MS and molecular simulation

    Shi X; Xiao Y; Zhao N; Yao L; Li H; Huang J; Song Z; Wang X; Wang X / 2025 / journal article / abstract checked

    Checked for this overview: Confirmed that it was analyzed for bitterness and astringency constituents before and after alkalization. / Confirmed the difference between the 6 bitterness constituents with DOT>1 and the astringency constituent set. / Confirmed the limitation that receptor analysis is limited to docking and MD.

  2. Effect of the type and degree of alkalization of cocoa powder on the physico-chemical and sensory properties of sponge cakes

    Puchol-Miquel Marta; Palomares César; Fernández-Segovia Isabel; Barat José Manuel; Perez-Esteve Édgar / 2021 / journal article / abstract checked

    Checked for this overview: Confirmed the role of alkalization and the results of the cake-application test.

Structured claims — open a section to read each claim's confidence, evidence and limits

Sensory (2)

cocoa powder — key compounds involved in bitterness: Epicatechin, (-)-epigallocatechin gallate, luteolin, protocatechuic acid, theobromine, caffeine (dose-over-threshold above 1)supported

Scope: Cocoa powder before and after microwave-assisted alkalization

Note: Methylxanthines appear in the same DOT set alongside 4 kinds of phenolics, and are not the sole bitterness driver in this material.

According to the Dose-Over-Threshold results, epicatechin, (-)-epigallocatechin gallate, luteolin, protocatechuic acid, theobromine, and caffeine contributed significantly to cocoa powder's bitterness (DOT > 1), while a partly different set, including syringic acid, p-coumaric acid, and 5-hydroxytryptamine, played the key role in astringency.
Limitations: Abstract only. The thresholds and concentrations, and their sources, are not given, and the abstract contains no description of a human panel. Receptor binding is in silico docking and molecular dynamics, not a receptor assay. A corrigendum exists (10.1016/j.foodchem.2026.150204), but its content has not been obtained.
Source: Bitter and astringent characteristics of alkalized cocoa powder: analysis using UPLC-Q-TOF-MS/MS and molecular simulation (Shi X; Xiao Y; Zhao N; Yao L; Li H; Huang J; Song Z; Wang X; Wang X, 2025) · abstract checked
Show dataingredient-cocoa-powder —has_key_bitter_organoleptics→ "Epicatechin, (-)-epigallocatechin gallate, luteolin, protocatechuic acid, theobromine, caffeine (dose-over-threshold above 1)"
claim: clm-cocoa-powder-dot-bitter-set / type: sensory / updated: 2026-08-30
cocoa powder — perceived bitterness is affected by: Addition of cocoa flavoring without a nose clip (with the sense of smell intact) (cocoa beverage). In a milk beverage made bitter with caffeine, on the other hand, vanilla flavoring did not significantly increase sweetness, but unexpectedly strengthened bitterness.preliminary

Scope: Layer: solution. In Experiment 1, cocoa flavoring and vanilla flavoring were added to an instant cocoa beverage; in Experiment 2, vanilla flavoring was added to a milk beverage made bitter with caffeine. Sensory profiling was compared with and without a nose clip.

Note: The same source contains both an example that moved as expected from aroma-taste congruence (cocoa aroma toward bitterness, vanilla aroma toward sweetness) and an example that moved against that congruence (vanilla aroma strengthening the bitterness of a milk beverage). Within the scope of the abstract.

Verbatim from the abstract: “Without noseclip, olfactory/taste interaction in the cocoa beverage led to an enhancement of bitterness induced by the cocoa flavouring and an increase in sweetness from the vanilla flavouring. On the contrary, in the caffeinated milk, the addition of vanilla flavouring did not significantly increase sweetness, but unexpectedly enhanced bitterness.”
Limitations: Confirmation is limited to the abstract; the full text's statistical values, panel size, and scale details were not confirmed. Limited to the abstract. The flavoring addition levels and the number of participants are not given in the abstract.
Source: Modulation of perceived taste by olfaction in familiar and unfamiliar beverages (Labbe D; Damevin L; Vaccher C; Morgenegg C; Martin N, 2006) · abstract checked
Show dataingredient-cocoa-powder —has_perceived_bitterness_affected_by→ "Addition of cocoa flavoring without a nose clip (with the sense of smell intact) (cocoa beverage). In a milk beverage made bitter with caffeine, on the other hand, vanilla flavoring did not significantly increase sweetness, but unexpectedly strengthened bitterness."
claim: clm-w70b-cocoa-beverage-aroma-enhances-bitterness / type: sensory / updated: 2026-09-07

How processing and cooking change it (1)

cocoa powder can be debittered by: Alkalization (alkalizing / the Dutch process). An industrial process that treats cocoa with alkalizing agents such as potassium carbonate, sodium carbonate, and sodium hydroxide, raising the pH from natural cocoa's acidic range to a neutral-to-alkaline range. Puchol-Miquel et al. (2021), after positioning this treatment as "an important step in cocoa processing for reducing bitterness, increasing solubility, and developing color," applied commercial cocoa powders with varying types and degrees of alkalization to sponge cake, and reported that while differences in treatment conditions affected the batter's physical properties and the cake's color and texture, consumers' overall rating itself did not change significantly with the treatment condition.supported

Scope: A test applying commercial cocoa powder, with varied alkalization treatment conditions, to sponge cake

Note: A sensory-score figure for bitterness itself has not been confirmed within the range of abstracts and secondary summaries reached so far. It is shown here by combining the description positioning it as a process that reduces bitterness with the cake's sensory-evaluation data. Reaching the full text was not completed this time (the publisher's site sits behind a paywall).

Positions alkalization (the Dutch process) as "an important step in cocoa processing for reducing bitterness, increasing solubility, and developing color," and, in a sponge-cake application test comparing different treatment conditions, reports effects on batter physical properties, color, and texture. Consumers' overall rating of the cake itself showed no significant difference by treatment condition.
Limitations: Neither the full text nor the abstract on the publisher's site could be reached directly due to a paywall; the description is limited to the range where multiple independent web summaries agree. A specific figure for the bitterness sensory score has not been confirmed.
Source: Effect of the type and degree of alkalization of cocoa powder on the physico-chemical and sensory properties of sponge cakes (Puchol-Miquel Marta; Palomares César; Fernández-Segovia Isabel; Barat José Manuel; Perez-Esteve Édgar, 2021) · abstract checked
Show dataingredient-cocoa-powder —can_be_debittered_by→ "Alkalization (alkalizing / the Dutch process). An industrial process that treats cocoa with alkalizing agents such as potassium carbonate, sodium carbonate, and sodium hydroxide, raising the pH from natural cocoa's acidic range to a neutral-to-alkaline range. Puchol-Miquel et al. (2021), after positioning this treatment as "an important step in cocoa processing for reducing bitterness, increasing solubility, and developing color," applied commercial cocoa powders with varying types and degrees of alkalization to sponge cake, and reported that while differences in treatment conditions affected the batter's physical properties and the cake's color and texture, consumers' overall rating itself did not change significantly with the treatment condition."
claim: clm-cocoa-powder-alkalization-debitters / type: processing / updated: 2026-09-02

↑ Top of page · ← Encyclopedia (English entries)