When purchasing hazelnut granules for the confectionery industry, technical specifications, particle size, and quality standards make the difference between a supply that is “OK” and one that causes issues on the line, in the recipe, or in shelf life. A well-written B2B specification reduces ambiguity: it defines what is meant by “granules,” how they are measured, which defects are acceptable, and which checks must accompany each batch.
Below is a practical guide to setting up (or verifying) a technical specification, using criteria commonly applied in the confectionery sector.
Which technical specifications should be included in a spec sheet (moisture, fats, defects, foreign bodies)?
In a spec for granules, it’s best to clearly separate composition requirements, purity requirements, and defect definitions. And always specify whether the granules are raw or roasted (and, if so, with or without skin).
Typical parameters to include:
- Moisture: crucial for stability and mould risk. State a maximum limit and the test method (or at least “according to an internal method/agreed reference standard”).
- Fat content: hazelnuts are naturally rich in lipids; rather than “min/max,” it is often used as a descriptive value for recipe consistency and aromatic yield. If you need a range, define it with the supplier based on the raw material and process (raw/roasted).
- Product defects (clear definitions):
- burnt/over-roasted hazelnuts (if roasted)
- immature or shrivelled hazelnuts
- visible mould or abnormal odours
- fragments with skin above a set threshold (if “blanched/skinless” is required)
- Foreign bodies: here you need “zero tolerance” for hazardous materials (glass, metal, stones) and a strict approach for other contaminants (plastics, wood). In the spec it is useful to require:
- in-line metal detector and/or X-ray (where applicable)
- sieving/aspiration procedures and visual checks
- Allergens: hazelnut is an allergen. Specify B2B labelling requirements and cross-contamination management (especially if the supplier also handles almonds, peanuts, sesame, etc.).
- Process-related aspects: if the granules are intended for inclusions (ice cream, spreads, bars), clarify:
- required roast level (light/medium/dark—ideally linked to measurable parameters: colour/aroma)
- any stabilisation (e.g., rapid cooling post-roast, oxygen management)
This section is the core of hazelnut granules for the confectionery industry: technical specifications, particle size and quality standards, because it converts finished-product needs into verifiable requirements.
How is the particle size of hazelnut granules defined (granulometry, sieves, tolerances and fraction blends)?
In industrial contexts, “particle size” for granules almost always means granulometry, i.e., the particle size distribution. If you don’t define it properly, you risk:
- segregation in hoppers and dosing systems (too many fines that compact/bridge)
- inconsistent visual performance (in coatings and inclusions)
- uneven roasting (if you roast in-house or rework)
How to set it in the spec:
- Define the nominal fraction (e.g., “2–4 mm,” “fine granules,” “medium granules”).
Better still: state the mm range. - Measurement method: sieve analysis using standard sieves (specify the sieve series and conditions: time, vibration, sample quantity). Even without citing standards, the method must be unambiguous.
- Tolerances: require a maximum allowed percentage of:
- fines (below the lower sieve)
- oversize (above the upper sieve)
- Fraction blend: if you need a “smooth” particle size curve (useful for coatings or inclusions that must “fill” well), explicitly request a distribution and not only a range. Conceptual example: “predominance of the nominal fraction, with fines and oversize limited.”
Practical tip: ask the supplier for a granulometry sheet with sieve results across multiple batches. It’s one of the fastest ways to see whether supply is stable over time.
Which quality standards and certifications really matter for the confectionery industry (HACCP, BRC/IFS, traceability, origin)?
Here it helps to distinguish between system obligations and commercial requirements requested by end customers.
Standards and requirements that often matter in confectionery:
- HACCP: it must be implemented, documented, and consistent with the process (roasting, milling, sieving, packing). In the spec you can request evidence of:
- hazard analysis and CCP/OPRP
- foreign body and allergen management
- BRC or IFS (or equivalent schemes recognised by retail/industry): they are not “legally mandatory,” but in many B2B supply chains they are an entry requirement. If you need them, stating it upfront avoids non-comparable offers.
- Traceability: require lot-to-lot traceability (incoming and outgoing) and response times in case of recall. Also specify what must appear on documents: lot code, production/packing date, origin.
- Origin: if origin is a requirement (for positioning, recipe, or claims), it must be defined unambiguously: country, and possibly region. If relevant to the project, you may indicate varieties or traditional designations (for example Nocciola Gentile Romana, an Italian hazelnut type from the Lazio area) only if they are truly required by the finished product and managed with segregated traceability.
This section also includes alignment with your internal policy on hazelnut granules for the confectionery industry: technical specifications, particle size and quality standards: it’s not enough to “have a certificate”—it must cover the correct scope (site, process, product category).
Which analytical and sensory checks should you request from the supplier (oxidation, rancidity, colour, roasting, microbial load)?
Granules are particularly sensitive to oxidation and odour absorption, as well as roast variability. A good spec requires controls that catch these risks before they reach production.
Analytical checks (to be agreed for frequency and methods):
- Oxidation/rancidity indicators: request the parameters the supplier uses to monitor rancidity (e.g., chemical indices and/or internal tests). If you don’t want to lock into a number, you can require “compliance with shared internal limits” and lot-by-lot trending.
- Microbial load: especially for granules intended for products with limited subsequent processing. Request a microbiological profile consistent with the use (post-process inclusions vs baking).
- Aflatoxins: a typical concern for tree nuts. If your quality plan includes it, add the requirement for testing and compliance with the legal limits applicable in the destination market.
- Moisture and water activity (if managed): useful to predict stability and mould risk, especially for long storage.
Sensory and visual checks:
- Odour and taste: absence of rancid, mouldy, burnt (if roasted) notes, and any off-odours from packaging.
- Colour: define an acceptable range (also by reference to colour standards or sample photos). Colour is often the fastest way to catch uneven roasting.
- Roast uniformity: if the granules are roasted, request acceptance criteria (uniformity, absence of burnt pieces, expected aromatic profile).
If your application is highly sensitive (pralines, premium spreads, industrialised artisanal-style gelato), it is worth formalising a sensory panel with a scoring sheet and acceptance thresholds.
Which packaging and logistics requirements affect quality (packaging, protective atmosphere, transport, storage)?
Many non-conformities come not from the granules themselves, but from how they are protected from oxygen, light, heat and odours.
What to specify:
- Barrier packaging: food-contact suitable material with adequate oxygen/moisture barrier (to be defined with the supplier based on shelf life and channel).
- Protective atmosphere: if the product is roasted or intended for long storage, consider requiring packing in modified atmosphere or, in any case, oxygen management. It’s not always essential, but it often helps preserve aromatic stability.
- Pack format and shipping units: bags, cartons, big bags. State net weight, tolerances, and palletisation requirements.
- Transport: require clean, dry transport free from odorous contaminants. Specify limits on heat exposure (qualitatively if you don’t have an internal threshold).
- Storage: guidance on temperature and environment (cool, dry, away from odour sources). If your supply chain involves long stockholding, include requirements on remaining shelf life at delivery.
A complete spec links these aspects to quality: the same granules, with different logistics, can perform very differently in production.
How to compare offers and technical data sheets for hazelnut granules without mistakes (key parameters, sample trials, non-conformities)?
To compare B2B offers correctly, you need a single evaluation grid. The most common risk is comparing prices for products that are not actually equivalent (different granulometry, roast level, defect profile, packaging).
Comparison checklist (practical):
- Product alignment: raw or roasted? with skin or without? same nominal granulometry?
- Actual granulometry: request sieve analysis with percentages by fraction, not just “2–4 mm.”
- Defects and foreign bodies: are definitions and limits written? how are they controlled?
- Oxidative stability: what checks does the supplier perform and how often? how are “at-risk” lots handled?
- Certifications and traceability: are they relevant to the site and process? is traceability fast and documented?
- Packaging: barrier properties, protective atmosphere, guaranteed remaining shelf life.
- Sample trials: before qualification, request:
- representative samples (not “hand-picked”)
- recipe and line trials (dosing, visual yield, aroma)
- post-storage verification (even short) if your product is sensitive
- Non-conformity management: clarify in the contract response times, acceptance criteria, replacement/returns, and required documentation (lot COA, analytical reports).
With this approach, the key phrase hazelnut granules for the confectionery industry: technical specifications, particle size and quality standards stops being a title and becomes a method: measurable specs, repeatable controls, and clear responsibilities along the supply chain.