The specific volume of Kougelhopf obtained from sweet doughs frozen at 20, 30, 40 C and liquid nitrogen grouped in Fig. 3.
Statistical analysis showed significant difference (P > 0.05) between SY and DY Kougelhopf samples obtained by sweet doughs frozen at 20, 30 and 40 C, but no significant difference was found between sweet doughs (SY and DY), fresh and frozen in liquid nitrogen.