Abstract:
This research was conducted to develop a veggie burger as beef meat analogue using
vegetable based ingredients without preservatives for health conscious consumers.
Suitable vegetable mixture proportion was selected & blanched vegetables were
selected for further experiments based on the colour persistence. Chickpea was selected
for burger base out of Chickpea, Chickpea dhal, Mung bean, Lentil. Rice flour: wheat
flour (RW), rice flour: isolated soya protein; ISP (RI), wheat flour: ISP (WI), Chickpea
flour: ISP (Cl) were used as binder mixtures (1:1) & based on the sensory results RW &
RI selected as best binder mixtures. Further trials were performed to choose best
formulation while testing prior selected 2 different binder mixtures with and without fat
emulsion (5 & 0% w/w) which resulted in 4 treatments such as RW 5% (T1), RI 5%
(T2), RW 0% (T3) & RI 0%(T4). The influence of emulsion (0 & 5%) and binder (RW &
RI) on the biochemical properties (pH, proximate as TS, fat, ONF, moisture, ash),
keeping qualities (microbial as salmonella, Staphylococcus aureus, E coli, PDAC, TPC
and peroxide value), physical properties (WHC, purge loss, cooking loss) & sensory
characters of veggie burger stored at -18°C for 90 days were tested. To investigate the
effect of freezing & thawing, the set of sample was thawed daily for 2 hours then
refreeze again and another sample was freeze with out thawing and analyzed for
microbial & sensory properties. Sensorial characters were altered with emulsion
addition especially in texture and juiciness & T1 selected as best sample based on
sensory score rating remained between good and very good during storage (p<0.05).
Proximate analysis revealed that T1 had gained 51.68% moisture, 8.38% fat, 48.33%
TS, 36.84% ONF & 3.1% ash and also TPC (4.54 log CFU/g), pH (6.67) & peroxide
value (9.62 meq/kg) with in standard even after 90 days of storage. Cooking loss
components were not affected by binder or emulsion (p>0.05). Tj had 1.75%±0.03
lowest purge and 45.98% ±0.01 highest WHC at days 90 (p<0.05) due to rice and wheat
flour addition was improving the reduction of purge and WHC. Microbial counts were
4.11 and 4.20 log CFU/g in thawed & unthawed samples, respectively (p<0.05). But
they were in acceptable level for TPC even after 45 days. At 30th day, thawed was
unsatisfactory for PDAC (2.04 log CFU/g). Addition of RW with emulsion to burger
could not only provide perception of nutrition but also produce a comparable product in
term of textural and sensory characters.
