STUDIES ON SPONGE CAKE WITH WHEAT-STARCH .3. THE EXPANSION OF WHEAT-STARCH SPONGE CAKE BATTER UNDER REDUCED PRESSURE AS BASIC STUDIES ON BAKING

The expansion potential of cake batter was tested under reduced pressure conditions. When sponge cake batter with wheat flour or wheat starch was prepared (at 25-degrees-C), the expansion of air cells through incremental increase in internal pressure was greater in wheat starch batter than in wheat flour batter. When the sponge cake batters were heated in the oven to 60-degrees-C, 70-degrees-C, or 80-degrees-C, the expansion of air cells was inhibited by the heat denaturation of ingredents more remarkably in wheat flour batter than in wheat starch batter. As a result, the expansion behavior of the wheat starch cake batter was found to be considerably higher, more stable and continuous, compared with that of the wheat flour cake batter.