The investigation aims the synthesis of copper oxide nanoparticles (CuO NPs) and Zinc doped Copper Oxide nanoparticles (Zn-CuO NPs) using Abutilon indicum plant extract. This method is completely a green method, free from toxic and harmful solvent. This method has many advantages such as economic viability, ease to scale up and less time consuming. The Copper oxide nanoparticles and Zn doped copper oxide nanoparticles were synthesized by mixing copper nitrate, Zinc acetate and Abutilon indicum aqueous leaf extract. The biosynthesized copper oxide nanoparticles and zinc doped copper oxide nanoparticles were characterized by X- ray diffraction (XRD), Energy dispersive X-ray analysis (EDX), UV-Vis spectroscopy, Fourier-transform infrared spectroscopy (FT-IR) and scanning electron microscopy (SEM). The existence of the copper oxide nanoparticles was revealed by UV-Vis spectroscopy. The FTIR spectra of control (leaf extract) and synthesized Copper oxide and Zinc doped copper oxide nanoparticles identified the functional groups of the active components.