Textile dyehouses, like many other industries, strive to improve their sales performance by offering an alternative product range for their customers. Particularly, environmentally sensitive consumers take care to choose environmentally friendly products by examining the production processes of the textile materials they use, which accelerates this process. Manufacturers enrich at least some of them, if not the entire product palette, with products that we can call special production. Liquorice plant (Glycyrrhiza glabra L.) is presented as a dyestuff source in this study in order to provide dyehouses with an alternative source for an environmentally friendly production process. Cotton yarn and woven fabric, whose pre-treatment process was completed, was dyed using Liquorice. Four different metal salts were used to increase the color yield in the dyeing process (KAl(SO₄)₂.12H₂O, K₂Cr₂O_7, FeSO₄.7H₂O, CuSO₄.5H₂O). The simultaneously-mordanting method was used in the dyeing process and the salt amount was adjusted to be equal to the weight of the cotton material to be dyed. Dyeing operations were carried out separately in the laboratory environment at 100°C for one hour. It has been observed that as a result of the dyeing processes using Liquorice plant, pink-pinkish colors can be obtained. After dyeing, the dyed samples were washed and unfixed dyestuff wastes were removed. Washing, rubbing and light color fastness tests were carried out after the cotton yarns and woven fabrics dyed using the simultaneously-mordanting method were dyed. The CIE L*a*b* and K/S color values ​​of the stained samples were measured with a Konica Minolta 3600 brand spectrophotometer. It can be said that satisfactory results can be obtained in terms of both color fastness values and CIE L*a*b* color values.