Purpose. To study the peculiarities of the indicators of quality formation of bread made with the addition of lentil flour. Methods. The research was carried out according to the technology of bakery and pasta production. Products made from wheat flour of the first grade and rye were used as a control, while the bread made with the addition of 5 to 30% of lentil flour (variety 'Chrysolit'. The bread was baked in a cabinet oven at a temperature of 220 ± 2°C. Both ready dough and end product was evaluated by physico-chemical and organoleptic indicators. Results. The addition of lentil flour had different effects on the quality of wheat and rye bread. In particular, in wheat flour dough, with the addition of 5–30% lentil flour, the final acidity increased from 2.5 to 2.7–3.8 degrees, or 1.1–1.5 times. The release of carbon dioxide decreased from 848 to 646–790 cm3/100 g, or 1.1–1.3 times. The water content of the dough changed insignificantly. The duration of maturation decreased from 63 to 41–57 min, porosity from 78 to 52–74%. Baking increased from 4.3 to 4.7–8.5%, drying – from 4.5 to 5.0–7.0%. In the rye flour dough, the acidity decreased from 2.8 degrees in the control to 1.5–2.3 degrees, or 1.2–1.9 times with the addition of 5–30% lentil flour. The water content of the dough was at the control level, as it did not change significantly. With the addition of 5–10% lentil flour, the duration of fermentation decreased from 60 to 50–55 min, and with the addition of 15–30% lentil flour, it increased to 62–67 min. With the addition of 5–30% lentil flour, dimensional stability decreased from 0.50 to 0.25–0.48, porosity – from 72 to 42–67%. Baking of rye bread increased from 5.5% in the control to 5.8–9.4%, and drying increased from 6.0 to 6.6–8.8%, depending on the variant of the experiment. It should be noted that the addition of 5–15% lentil flour did not change the appearance of wheat and rye bread. The addition of 20–30% lentil flour ensured the formation of bread that did not meet the standards of DSTU 7517:2014. Wheat Flour Bread. General Technical Conditions and DSTU 4583:2006. Rye Bread and a Mixture of Rye and Wheat flour. General technical conditions. Conclusions. Adding 5–15% lentil flour to a wheat or rye bread recipe does not change the appearance of the bread. The surface of the bread was smooth without cracks and dents, the color of the crust was light green, and the color of the crumb was light, with barely noticeable specks of lentil flour. At the same time, the acidity increases and the release of carbon dioxide from the dough decreases. In addition, the addition of 5–15% lentil flour increases the baking and drying of wheat and rye bread, and the duration of maturation, dimensional stability, specific volume and porosity decrease. Adding 20–30% of lentil flour to the bread recipe is impractical, as it greatly spoils its appearance.
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