Abstract
Foams were prepared from starfruit ( Averrhoa carambola L.) puree by adding various concentrations of methyl cellulose (Methocel 65HG). All foams were prepared by whipping using a kitchen mixer. Overrun of foams from various concentrations of methyl cellulose were compared. Average bubble diameter and bubble size distribution were calculated based on microphotography. Overrun and stability of foams increased with increasing methyl cellulose concentration until maximum value was obtained at methyl cellulose concentration of 40 g/kg. At this concentration, the overrun value of 653.2% and foam density of 0.153 g cm −3 was obtained. Higher concentration of methyl cellulose produced larger air bubbles. The size of the air bubbles showed a wide distribution as the methyl cellulose concentration was increased, with the average diameter ranged from 176 to 381 μm.
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