Effect of added enzymes and quinoa flour on dough characteristics and sensory quality of a gluten-free bakery product

The study is aimed at developing a new cereal-based product, with increased nutritional quality, using quinoa flour. The effect of the use of transglutaminase (TGase) and proteolytic enzymes on the microstructure, properties and in vitro digestion of gluten-free bakery products based on quinoa flour was evaluated. Microstructural results evaluated by means of Scanning Electron Microscopy showed that the quinoa starch granules are rather small (0.4-2 mu m) and the presence of TGase induced significantly changes in dough and baked samples microstructures. The overall acceptability of the breads was improved by TGase addition. The results achieved showed that these enzymes have different effects on the bread characteristics and may improve properties of formulations, setting the basis for the development of baked quinoa products.