This work presents mixed protein-starch systems as effective foaming agents and stabilisers. The starch
size and hydrophobicity play a dominant role in determining the levels of synergy observed. Egg White
Protein (EWP) and Pea Protein Isolate (PPI) were selected at two concentrations (0.5, 1 wt. %) along with
three starch species of concentrations between 0.5, 1, 3 & 5wt. %. Two commercial OSA-modified starches
are compared to a native granule and its heat-treated counter part. The system's effectiveness to
incorporate air (overrun) as well as its capacity to hold structure (half life) is evaluated. starch's physical
properties (contact angle and size) and their effect on the nature of the Air/Water (A/W) interface
(interfacial dilatation rheology, surface tension) are also explored. The effect of protein species as well as
starch size and hydrophobicity on foam stability is determined and discussed. The study demonstrates
that addition of OSA modified starch (0e5wt%) to (EWP) foams can enhance foam stability by up to
1200% without compromising the foaming capacity, mainly due to a hypothesised exclusion volume
effect. Where as the larger heat-treated starch granule is found to increase stability of wet foams by
800%, through a combination of mechanisms.