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How is chocolate made?

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Quick answer

Chocolate starts as cacao beans that are fermented in their pulp, sun-dried and roasted. The shells are removed and the nibs ground into cocoa liquor, a paste of cocoa solids and cocoa butter. Sugar and often milk are added, the mix is refined and conched, then tempered and moulded into bars.

Chocolate is made by fermenting, drying and roasting cacao beans, grinding their kernels into a paste called cocoa liquor, then mixing it with sugar and often milk. The mixture is refined, conched and tempered so it sets glossy, smooth and snaps cleanly.

Step by step

  1. Farmers split ripe cacao pods and pile the beans with their pulp to ferment for about five to seven days.
  2. The fermented beans are spread out to dry in the sun until most of their moisture is gone.
  3. Factories roast the beans, crack them and blow away the light shells to leave cocoa nibs.
  4. The nibs are ground into cocoa liquor, which is mixed with sugar, cocoa butter and sometimes milk powder.
  5. Rollers refine the mixture until particles are too small to feel, and conching machines stir it for hours.
  6. The chocolate is tempered by controlled cooling and gentle reheating, then poured into moulds and set.

Key things to understand

  1. Cacao beans come from pods of the cacao tree, which grows only in warm, humid regions near the equator.
  2. Freshly scooped beans ferment in their sweet white pulp for several days, which develops the precursors of chocolate flavour.
  3. Dried beans are roasted, cracked and winnowed, leaving broken kernels called nibs that are roughly half cocoa butter.
  4. Grinding melts that fat into a flowing cocoa liquor, which is blended with sugar, extra cocoa butter and sometimes milk powder.
  5. Conching smooths flavour, and tempering cools and reheats the chocolate so its cocoa butter forms one stable crystal type.

Labelled diagram

  1. Cacao pod

    Ripe pods hold 30 to 50 beans wrapped in sweet white pulp.

  2. Fermenting heap

    Microbes break down the pulp and start flavour chemistry inside each bean.

  3. Roaster and winnower

    Heat develops roasted aromas, then shells are cracked off to leave nibs.

  4. Grinder

    Nibs become liquid cocoa liquor as friction melts their cocoa butter.

  5. Conche and temperer

    Long mixing smooths flavour; controlled cooling sets stable, glossy crystals.

Bean to bar: the chocolate-making line

Real-world examples

  • Côte d'Ivoire and Ghana in West Africa are the world's two largest growers of cacao beans.
  • In India, cacao is grown mainly as an intercrop under coconut and areca palms in Kerala, Karnataka and Andhra Pradesh.
  • Small bean-to-bar makers roast and grind beans from a single farm to highlight that origin's flavour.
  • Cocoa powder is made by pressing cocoa liquor to squeeze out most of its cocoa butter.

Common mistake

✗ Myth: Chocolate gets its colour and flavour straight from the raw cacao bean.

✓ Fact: Raw cacao beans are bitter and pale purple inside. Chocolate flavour and brown colour develop mainly during fermentation, drying and roasting.

People also ask

How is chocolate made step by step?
Cacao pods are harvested and their beans fermented for several days, then dried. Factories roast the beans, remove the shells and grind the nibs into cocoa liquor. Sugar, extra cocoa butter and sometimes milk are mixed in. The mass is refined, conched for hours, tempered and finally moulded into bars.
Why do you have to temper chocolate?
Cocoa butter can set in six different crystal forms, and only one, known as Form V, gives a glossy surface, clean snap and smooth melt. Tempering heats the chocolate to melt all crystals, cools it to seed new ones, then warms it slightly so only the desirable Form V crystals survive.
What is cocoa butter?
Cocoa butter is the natural fat in cacao beans, making up roughly half of the dried kernel. It is solid at room temperature but melts just below body temperature, which is why good chocolate melts in the mouth. It is separated by pressing cocoa liquor, leaving solids that become cocoa powder.
Why must cacao beans be fermented?
Fermentation creates the chemical building blocks of chocolate flavour. Yeasts and bacteria feed on the pulp, producing heat and acids that kill the seed and trigger enzymes inside it. Unfermented beans roast into a bitter, astringent product that tastes little like chocolate.
What is conching?
Conching is long, slow mixing of warm liquid chocolate, lasting from several hours to a few days. The motion coats sugar and cocoa particles in cocoa butter, drives off some harsh acids and moisture, and gives the finished chocolate a rounder flavour and smoother feel.
What makes white chocolate different?
White chocolate contains cocoa butter, sugar and milk solids but none of the brown cocoa solids. That is why it has a mild, creamy taste without bitterness, and why some people argue it is not true chocolate even though it comes from the cacao bean.
Why does chocolate turn white on the surface?
That whitish film is called bloom. Fat bloom happens when cocoa butter melts and recrystallises on the surface, and sugar bloom forms when moisture dissolves surface sugar that later dries. Bloomed chocolate looks dull and feels grainy but is safe to eat.

Part of the guide: Food & Kitchen Science →