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Substitutions · 7 dishes here use it
Out of cocoa
Bitterness and depth with almost no fat, so it dries out whatever it goes into. Bloom it in something hot before it meets the rest, or it stays powdery and dull.
Everything below is judged against that job. A swap that covers it is a swap; one that only looks similar is not.
2 of the 7 dishes here that mention cocoa list it as optional — 29% of them. In those, the correct substitution is nothing.
Functional substitution system
Replace the job, then correct the side effects
For cocoa, the page's working definition is: Bitterness and depth with almost no fat, so it dries out whatever it goes into. Bloom it in something hot before it meets the rest, or it stays powdery and dull. The swap cards below are judged against that job rather than visual resemblance.
Job → candidate → side effects → small test → correct.
1 · Job
What is the missing ingredient doing?
2 · Candidate
Choose the shelf item that replaces that function.
3 · Side effects
Check water, fat, salt, acid, sweetness, and texture.
4 · Small test
Change a spoonful or small portion first when possible.
5 · Correct
Taste again and move only the axis that is still wrong.
The company cocoa keeps in this library, counted off required ingredients. A swap that argues with the top two is the wrong swap, whatever a chart says.