The Refrigerator vs. Proofing Chambers
In the Associazione Verace Pizza Napoletana (AVPN) Specification, temperature management is far more than a technical detail. It is a crucial part of the biochemical process that turns water, flour, salt and yeast into an easily digestible product with an unmistakable flavour.
Historically, authentic Neapolitan pizza was born from proofing at room temperature, a method still used by most AVPN member pizzerias. As the industry has evolved and the need for standardisation has grown, tools such as proofing chambers have been introduced as a support, offering greater control and consistency.
Fermentation is generally carried out by Saccharomyces cerevisiae, compressed brewer's yeast, the most widely used yeast in pizzerias making Neapolitan pizza. Both during the bulk fermentation and the final proof in balls (the second rise), the dough is meant to ferment at room temperature, within an optimal range of 18–25°C (22°C being ideal).
Refrigeration (typically at 4–6°C) is a common technique in bread-making and in other styles of pizza, used to slow down yeast activity. However, at temperatures as low as 4°C the yeast is effectively put to sleep, which drastically reduces its metabolic activity and, as a result, compromises both rising and maturation. Insufficient fermentation may show up as poor caramelisation of the sugars during baking.
From a rheological point of view, the dry air of a refrigerator can also dry out the dough and cause an unwelcome "skin" to form on the surface. This crust hampers handling, reduces the dough's elasticity and ultimately affects the quality of the finished pizza.
For these reasons, refrigeration is not part of the method set out in the AVPN Specification.
Where the refrigerator aims to hold back (slow down) fermentation, the proofing chamber is the tool that guides and controls the dough in line with traditional parameters.
These units allow you to set a constant temperature (usually between 18°C and 22°C), in keeping with the optimal range, and, most importantly, to control relative humidity. Keeping humidity at around 70–80% prevents a skin from forming on the dough balls.
Thanks to fan circulation, which spreads warm, humid air evenly without blowing it directly onto the dough, the chamber ensures that every dough ball receives exactly the same treatment, wherever it is placed.
For AVPN, the goal is a balance between tradition and precision. Whether you choose the traditional route of proofing at room temperature or the help of a proofing chamber, temperature should be treated as an active ingredient. Dough managed properly at controlled temperatures, in full compliance with the Specification, is not just a logistical choice for the pizzaiolo: it guarantees consistent quality and a final product that is perfectly matured and easy for the customer to digest.
By Aurora Napolitano, AVPN Training Manager
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