Paper industry is heavily relying on non-biodegradable petroleum-based plastic coatings. Targeting to minimize the paper sector ecological footprint, biodegradable and biobased coatings have been explored. On the other hand, agrifood industry, such as garlic processing companies, waste valuable biomolecule-rich by-products. In this work, the feasibility of using crude garlic peels (GP) as an additive to make a commercially available bio-based plastic suitable for coating paper sheets was studied. Grinded GP was successfully blended with the bioplastic in different concentrations (5%-20%), conferring a brownish coloration, whose intensity was directly dependent on the GP dosage used. Bioplastic/GP-based formulations were successfully hot-pressed onto the paper sheets surface, allowing to increase their water contact angle (WCA) in 11%, to decrease their water vapor transmission rate (WVTR) in 184% and to increase their tensile strength in 190%. Therefore, GP revealed to be a promising natural additive for conferring pigmentation, water tolerance, and tensile resistance to bioplastics, opening an opportunity to extend the use of bioplastics in paper coating while valorising GP.