Spent coffee grounds (SCG) are the primary by-product of coffee production which still
contains functional properties with high natural antioxidant components. It can be
extracted using ultrasonic-assisted techniques and then integrated into baking products
such as cookies. This research is aimed to measure the physicochemical and sensory
acceptability of cookies incorporated with SCG extract. Extraction of SCG was done
using water through ultrasonic extraction following incorporated SCG water extract into
cookies. Six different formulations were developed using different amount of SCG extract
(A-control 0%, B-0.27%, C-0.52%, D-0.80%, E-1.07% and F-1.33%). Physicochemical
properties (antioxidant properties, colour profile, texture, moisture, sugar, fat, protein, ash,
calorie and texture profile) and the sensory acceptability of SCG extract cookies was
observed. Total phenolic content (TPC) was used to quantify the antioxidant content while
the antioxidant activity was measured using 2,2-diphenyl-2-picrylydrazyl radical
scavenging activity assay (DPPH) and ferric reducing antioxidant power (FRAP) assays.
Results show that decreasing in lightness (L*) and yellowness (b*) with the increasing
percentage of SCG extract were observed. In contrast with L* and a* value, the b* value
of cookies was increased with the increasing percentage of SCG extract. Formulation E
(1.07% SCG extract) showed the highest percentage in almost all proximate analysis such
as 6.49±0.39 moisture, 2.11±0.22 ash, 20.42±0.74 crude fat, 8.13±0.05 crude protein and
4.37±0.04 crude fibre content. The highest amount of antioxidant content was depicted by
the formulation D cookie (1.72±0.04 mg GAE/g). The best antioxidative activity was
found in formulation E (7.80±0.27 DPPH inhibition and 0.02 abs by FRAP analysis).
Sensory acceptance revealed that formulation E (1.33%) cookies were more accepted by
the panellists. It is interesting to note that SCG can serve as one of the ingredients for
cookie production that showed significant effects on the physicochemical and organoleptic
properties of the final products.