Angel food cakes were prepared based on the method of Pernell,
Luck, et al. (2002). The angel food cake preparation process was as
follows: 1. Foams were generated from protein solutions; 2. Dry
materials (flour and/or powdered sugar) were gently mixed into
the foams; 3. The batter was distributed into Teflon-coated metal
rectangle containers (8.5 15 cm2) and bake at 204 C for 14 min.
Two types of angel food cakes were prepared. One had all
powdered sugar added before foaming (ABF cakes) and the other
had sugar added after foaming (AAF cakes) (Table 1). This is
different from the method of Pernell, Luck, et al. (2002), in which
the powder sugar was partially added into the protein solution