Not only pasta: using durum wheat semolina for producing high quality Dittaino bread

Artisanal agri-food products are obtained according to traditional recipes and processing technologies, with features of high quality and genuineness. The “protected designation of origin” (PDO) quality mark identifies a food product whose features strictly depend on the geographical area of origin, due to the combined effect of soil and water physico-chemical characteristics, climate, microflora, and local artisanal processing techniques.

At European level, few breads have been awarded by PDO recognition: “Pane di Altamura” (Altamura bread), “Pagnotta del Dittaino” (Dittaino bread), and “Pane Toscano” (Tuscany bread), all produced in Italy, and the Swedish bread “Upplandskubb”. Dittaino PDO bread is obtained from durum wheat semolina and, starting from durum wheat cultivation, all its processing steps take place within the area closely surrounding the Sicilian town of Enna (Italy), along the Dittaino river (Fig. 1).

Fig. 1. Geographic area of origin of the Dittaino PDO bread.

The production of Dittaino PDO bread follows a very simple and genuine recipe exclusively based on local re-milled semolina, water, sourdough (composed of yeasts and lactic bacteria), and sea salt, without the addition of sugar, malt or malt extract, fats, anti-staling agents and enzymes or any other additive. This kind of bread, shaped as a round loaf weighing between 500 g and 1 kg (Fig. 2), is finally baked at 230 °C for 60 min.

We performed a detailed quality characterization of both bread and semolina used to prepare it, with the aim of improving technical awareness by producers, overcoming empirical knowledge, and enhancing quality and consumer appreciation. Samples of durum wheat Dittaino PDO bread, along with the semolina used, were collected in five samplings carried out in local bakeries of the Dittaino area.

Although a certain variability among samples was observed, the protein content of semolina, which has a positive effect on bread volume, was always above 10.5 g/100 g.

Regarding the dough, the tenacity to extensibility ratio (alveograph P/L) was in the range 2.2-2.7, inducing to expect for a limited increase in volume during leavening. Dough strength was between 193 × 10-4 J and 223 × 10-4 J, indicating the presence of sufficiently strong gluten, able to bear the prolonged leavening times required by sourdough-based bread-making.

Another quality trait observed in semolina was the amber-yellow color, partly transferred to bread and due to carotenoid pigments. The latter accounted for 2.30-3.65 mg/kg bread.

Fig. 2. Loaves of Dittaino PDO bread with European PDO mark.

Bread aroma profile, resulting from the complex combination of volatile compounds derived from semolina and those originated or modified during leavening and baking, was quantitatively characterized by ethanol and acetic acid (both from fermentation), followed by 3-methyl-1-butanol, 2-phenylethanol, 3-methylbutanal, hexanal, benzaldehyde, and furfural (all from thermal reactions, with the only exception of hexanal which comes from lipid oxidation).

The sensory profile of Dittaino PDO bread, which is characterized by a well-developed brown crust, was dominated by a marked toasted odor note, coupled to yellow and consistent crumb with well-perceivable sour taste and sour odor.

These observations help in defining the quality level of Dittaino PDO bread and could further increase the appreciation of end-users.

Virgilio Giannone 1, Mariagrazia Giarnetti 2, Alfio Spina 3, Aldo Todaro 1, Biagio Pecorino 4, Carmine Summo 2, Francesco Caponio 2, Vito Michele Paradiso 2, Antonella Pasqualone 2
1Department of Agricultural and Forest Sciences, University di Palermo – Viale delle Scienze Ed.4, 90128 Palermo, Italy
2Department of Soil, Plant and Food Sciences, University of Bari Aldo Moro, Via Amendola, 165/A, 70126 Bari, Italy
3Consiglio per la ricerca in agricoltura e l’analisi dell’economia agraria (CREA),
Centro di Ricerca per la Cerealicoltura e le Colture Industriali, Corso Savoia 190, 95024 Acireale, Italy
4Department of Agriculture, Food and Environment (Di3A), University of Catania, Via Santa Sofia 100, 95123 Catania, Italy

Publication

Physico-chemical properties and sensory profile of durum wheat Dittaino PDO (Protected Designation of Origin) bread and quality of re-milled semolina used for its production.
Giannone V, Giarnetti M, Spina A, Todaro A, Pecorino B, Summo C, Caponio F, Paradiso VM, Pasqualone A
Food Chem. 2018 Feb 15

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