Table 2. Proximate composition composition of cookies with different amounts of onion peel powder

Measurement (%)	Group1)				F-value
	Control	OP2	OP4	OP6
Moisture content	2.95±0.102)c3)	3.13±0.19bC	3.26±0.09aB	3.43±0.10a	7.16*4)
Crude ash	0.63±0.07b	0.66±0.06b	0.73±0.06aB	0.79±0.03a	4.25*
Crude protein	8.35±0.19	8.32±0.22	8.29±0.19	8.28±0.29	0.064

Control, no onion peel powder added; OP2, 2% onion peel powder added; OP4, 4% onion peel powder added; OP6, 6% onion peel powder added.
Values represent the mean±SD (n=3).
Different superscripts in a same row indicate significantly different by Duncan’s multiple range test (p<0.05).
p<0.05.