Pastry & Chocolate Technique

Tempering

Tempering chocolate is controlling the molecular crystallisation of cocoa butter. Form V crystals produce gloss, snap, and melting at body temperature. Without tempering: dull, soft, grey chocolate with fat bloom. With two methods (tabling and seeding), three temperature curves per type, and HACCP requirements for allergens.

6 crystal forms of cocoa butter (I to VI)

Form V desired crystal form (Barry Callebaut, 2023)

31-32 °C working temperature dark chocolate

33-34 °C melting point Form V (just below body temperature)

Requirements

Couverture chocolate (min. 31% cocoa butter) Contact thermometer (not infrared for the mass) Marble work surface (15-18 °C) for tabling Wide spatula and bench scraper Spoon for temper test

In brief

[DEFINITION] Tempering

Tempering is the controlled melting, cooling, and reheating of chocolate to create exclusively Form V crystals of cocoa butter. Form V (melting point 33-34 °C, just below body temperature) produces a smooth, glossy surface and crisp snap. Untempered chocolate recrystallises randomly into Form III, IV, or VI: a dull surface, soft texture, and fat bloom.

Cocoa butter contains a complex mix of triglycerides (palmitic acid, stearic acid, and oleic acid) that can assume 6 different crystal forms (polymorphism). Form V (also beta or "beta-2") is the only stable desired form for professional chocolate products. (Harold McGee, On Food and Cooking, Scribner, 2004)
Form I to IV: unstable, low melting points (17-27 °C). Melts at or below room temperature. Produces soft, rubbery chocolate. Form V: stable, melting point 33-34 °C, glossy and crisp. Form VI: most stable but forms during slow recrystallisation; produces a dull finish. (Beckett, The Science of Chocolate, RSC Publishing, 2000)
Temperature curve for dark chocolate (Callebaut, 2023): melt at 50-55 °C (destroy all crystal forms), cool to 27-28 °C (Form V nucleates alongside Form IV), reheat to 31-32 °C (Form IV melts away, only Form V remains: working temperature).
Temperature curve for milk chocolate: melt at 45-50 °C, cool to 26-27 °C, reheat to 29-30 °C. Lower temperatures due to the presence of milk fat, which reduces the crystallisation temperature. (Barry Callebaut Technical Documentation, 2023)
Temperature curve for white chocolate: melt at 40-45 °C, cool to 25-26 °C, reheat to 27-28 °C. White chocolate contains no cocoa solids (only cocoa butter): more susceptible to over-crystallisation and sugar bloom.

Three methods of chocolate tempering

Tabling (marble slab method)

Pour 2/3 of the melted chocolate onto a cool marble slab, continuously work with a spatula and bench scraper until it reaches 27 °C. Mix back with the warm 1/3 until working temperature is reached. Professional method, requires practice and a cool marble work surface.

Examples: Applications: large volumes, pralines, tablets, demonstration

Seeding method

Add 10-20% finely chopped, well-tempered chocolate to melted chocolate at 45 °C. The existing Form V crystals act as "seed" for new Form V nucleation. Simpler than tabling.

Examples: Applications: smaller volumes, stable working environment without marble

Tempering machine

Automated continuous temperature regulation. Chocolate circulates through a controlled cycle of melting, cooling, and working temperature. Standard in industrial and large-scale pastry operations.

Examples: Applications: high volumes, daily use, maximum consistency

Source: Barry Callebaut Technical Documentation (2023); Valrhona Ecole du Grand Chocolat, Tempering Manual (2020)

Temperature curves per chocolate type

Dark chocolate

Melt: 50-55 °C. Cool: 27-28 °C. Working temperature: 31-32 °C. Most commonly used type in professional pastry.

Cocoa content: min. 50%

Milk chocolate

Melt: 45-50 °C. Cool: 26-27 °C. Working temperature: 29-30 °C. Milk fat lowers all temperatures by 1-2 °C.

Cocoa content: 25-45%

White chocolate

Melt: 40-45 °C. Cool: 25-26 °C. Working temperature: 27-28 °C. No cocoa mass, only cocoa butter: most susceptible to bloom.

Cocoa mass: 0%

Cocoa butter

Temper at 35-36 °C. Used for thin coatings, bonbons, and transfer sheets. The same crystal forms as dark chocolate.

Pure fat, no sugar or cocoa

Always use a contact thermometer for the chocolate mass. Infrared thermometers measure the surface, not the core: the difference can be 2-3 °C, which completely disrupts the tempering process.

Step-by-step method

1

Melting: destroy all crystal forms

Melt dark chocolate to 50-55 °C au bain-marie or in the microwave (in 30-second intervals, stirring). At 50 °C all 6 crystal forms are destroyed. The chocolate is fully liquid and "blank". Overheating (above 58 °C): cocoa butter separates from the solids. (Barry Callebaut, 2023)
2

Tabling: pour 2/3 onto marble

Pour 2/3 of the melted chocolate onto a clean, cool marble work surface (ideally 15-18 °C). Use a wide spatula and a bench scraper. Work the chocolate continuously with a spreading and gathering motion.

Keep the marble slab cool: above 22 °C the cooling slows significantly and extends the working time.
3

Cool to 27-28 °C (dark chocolate)

Continue working until the chocolate thickens and the temperature drops to 27-28 °C. Form V crystals begin to nucleate alongside Form IV. The chocolate takes on a lighter, more matte colour and thicker consistency.
4

Mix back with warm fraction

Add the cooled 2/3 back to the warm 1/3 (still at 35-40 °C). Mix quickly and thoroughly. Final temperature: 31-32 °C (dark chocolate). At 31-32 °C Form IV melts away and only Form V remains.
5

Perform temper test

Place a small spoonful of chocolate on cool marble or the inside of the wrist. At room temperature of 18-20 °C the chocolate should set fully in 3-4 minutes with a glossy surface. Soft and dull = not tempered, start again.

Test before every batch. Chocolate at working temperature continues to cool: at 28 °C it begins to seize in the mixing bowl.
6

Process and store

Work with the tempered chocolate quickly at working temperature. Store finished products at 16-18 °C in a dry, dark space. Never in the refrigerator: condensation causes sugar bloom. Tempered bonbons: shelf life of 2-4 weeks when stored correctly.

HACCP Allergen management: inform guests about milk allergen (milk chocolate), soy lecithin (E322, present in virtually all chocolate), and nuts in pralines. EU Regulation 1169/2011.

HACCP: Allergen management and storage conditions

Chocolate allergens: EU Regulation 1169/2011

Soy lecithin (E322): present in virtually all industrial chocolate as an emulsifier. EU Regulation 1169/2011 classifies soy as one of the 14 mandatory declarable allergens. Inform guests with every chocolate dish.
Milk: present in milk chocolate and white chocolate. The same equipment used for dark and milk chocolate can transfer trace amounts. Document cross-contamination risk.
Nuts: pralines, ganaches, and coatings frequently contain hazelnuts, almonds, or pistachios. Label each product individually. Guests with nut allergies are a high-risk group.

Source: EU Regulation 1169/2011 (food information to consumers); EFSA Scientific Opinion on Allergens (2014)

Fat bloom and sugar bloom: quality defects

Fat bloom: grey, dull patches on the chocolate surface. Cause: Form V crystals dissolve during temperature shock and recrystallise as Form VI. The product is safe but commercially unusable. Prevention: store at a stable 16-18 °C, avoid temperature fluctuations.
Sugar bloom: white powdery surface. Cause: condensation dissolves sugar; upon drying the sugar recrystallises as a white layer. Prevention: never store in the refrigerator. If cooling is necessary: cover with cling film to prevent condensation.

Source: Valrhona Ecole du Grand Chocolat, Tempering Manual (2020); Beckett, The Science of Chocolate (RSC, 2000)

The 6 crystal forms of cocoa butter

Form	Name	Melting point	Characteristic
Form I	alpha	17-18 °C	Unstable, converts to Form II within hours
Form II	alpha'	23-24 °C	Unstable, soft and crumbly
Form III	beta-1	25-26 °C	Unstable, transitions to Form IV
Form IV	beta-2	27-28 °C	Reasonably stable, soft texture, dull surface
Form V	beta	33-34 °C	DESIRED: glossy, crisp, melts at body temperature
Form VI	beta-VI	36 °C	Most stable but causes fat bloom during slow cooling

Source: Beckett, The Science of Chocolate (RSC Publishing, 2000); Barry Callebaut Technical Documentation (2023)

Food cost: couverture versus confectionery chocolate

Couverture versus baking chocolate: couverture (professional chocolate) contains a minimum of 31-35% cocoa butter and is optimised for tempering and thin coatings. Cheap baking chocolate contains less cocoa butter and palm oil as a substitute: tempers poorly or not at all. The higher purchase price of couverture (EUR 8-18/kg versus EUR 3-6/kg) is justified by better workability, thinner coating layer, and lower waste from fat bloom.
Allergen documentation as a hidden cost: EU Regulation 1169/2011 requires that every chocolate product documents its allergen profile. Failure to document: NVWA fine of EUR 5,000-45,000 upon inspection. KitchenNmbrs logs allergens per recipe automatically.
Failed tempering = product waste: untempered chocolate with fat bloom is commercially unusable. Typical waste percentage for beginners: 20-30% of the batch. For a professional chocolatier: under 5%. A temper test (30 seconds) before every batch prevents this loss entirely.

Frequently asked questions

Why does chocolate have 6 crystal forms?

Cocoa butter is a mix of triglycerides with different fatty acid chains (palmitic acid, stearic acid, oleic acid). Depending on the speed and temperature of cooling, these triglycerides pack in different arrangements: 6 polymorphic forms (I-VI) with ascending melting points from 17 to 36 °C. Form V with a melting point of 33-34 °C is the desired form because it melts just below body temperature, is glossy, and snaps crisply. (Beckett, The Science of Chocolate, RSC Publishing, 2000)

What is the difference between fat bloom and sugar bloom?

Fat bloom: grey, dull patches or haze. Cause: Form V crystals dissolve during temperature shock and recrystallise as Form VI (larger, visible crystals). Sugar bloom: white powdery surface. Cause: condensation dissolves sugar and leaves a white sugar layer upon drying. Both are quality defects but not food safety risks. Prevention of fat bloom: stable 16-18 °C. Prevention of sugar bloom: never refrigerate. (Valrhona Tempering Manual, 2020)

What are the working temperatures per chocolate type?

Dark chocolate: 31-32 °C. Milk chocolate: 29-30 °C. White chocolate: 27-28 °C. Cocoa butter: 35-36 °C. If the working temperature is too high (above 34 °C for dark chocolate): Form V crystals begin to melt and the chocolate loses its temper. If too low (below 30 °C): the chocolate sets too quickly for thin coatings. (Barry Callebaut Technical Documentation, 2023)

How do I know if my chocolate is properly tempered?

Temper test: place a small spoonful of chocolate on cool marble or the inside of the wrist. At room temperature (18-20 °C) the chocolate should set fully in 3-4 minutes with a glossy, smooth surface and a crisp snap when broken. Soft and dull = temper again. The chocolate in the working bowl thickens when left still and thins when stirred: this proves that Form V crystals are active.

Which allergens are found in chocolate?

Dark chocolate: soy lecithin (E322, almost always present as an emulsifier), mandatory to declare as an allergen. Milk chocolate and white chocolate: also milk. Pralines and ganaches: nuts (hazelnuts, almonds, pistachios). EU Regulation 1169/2011 requires declaration of all 14 major allergens on every product.

Can I temper baking chocolate?

Baking chocolate (confectionery chocolate or compound coating) contains palm oil as a replacement for part of the cocoa butter. Palm oil has different melting behaviour and crystal forms: baking chocolate cannot be tempered like couverture. Compound coating does not need to be tempered and sets without a tempering process. For professional bonbons, pralines, and tablets: always use real couverture with a minimum of 31% cocoa butter.

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Food safety & HACCP

The HACCP guidelines, temperatures and storage advice on this page are based on Codex Alimentarius (WHO/FAO) as the global baseline standard and EU Regulation 852/2004. Local laws and regulations may differ. Always consult your national food safety authority for the applicable standards in your region:

Netherlands: NVWA (nvwa.nl)
Belgium: FAVV (favv-afsca.be)
Germany: BfR (bfr.bund.de)
United Kingdom: FSA (food.gov.uk)
United States: FDA (fda.gov) — FDA Food Code
EU general: EU Regulation (EC) 852/2004 on food hygiene
International: Codex Alimentarius CAC/RCP 1-1969 (revised 2020)

Allergens & dietary information

Allergen information is indicative. When in doubt about allergens in preparations, always contact the supplier or a certified allergological adviser. KitchenNmbrs accepts no liability for allergic reactions or diet-related harm.

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Sources and legal information

Barry Callebaut — Technical Documentation for Chocolate Tempering (2023)
Valrhona Ecole du Grand Chocolat — Tempering Manual (2020)
Harold McGee — On Food and Cooking (Scribner, 2004), Chapter 12: Sugars, Chocolate, and Confections
Beckett, Stephen T. — The Science of Chocolate (RSC Publishing, 2000)
EU Regulation 1169/2011 — Provision of food information to consumers (allergen labelling)
EFSA — Scientific Opinion on the evaluation of allergenic foods (2014)