Cryptococcus is an opportunistic pathogenic fungus that plays a significant role in human infections, especially in immunocompromised individuals. A hallmark of Cryptococcus virulence is its ability to synthesize melanin, a pigment that contributes to its resistance to various host defense mechanisms, including oxidative stress, immune responses, and thermal stress (Baker et al, Biol Chem 298(1):101519. 2021). The synthesis of melanin in Cryptococcus is catalyzed by the enzyme laccase, which converts precursors such as L-3,4-dihydroxyphenylalanine (L-DOPA) into melanin (Lee et al, mBio 10. https://doi.org/10.1128/mbio.02267-19, 2019). Since Cryptococcus cannot synthesize L-DOPA itself, it requires the exogenous addition of L-DOPA to the growth medium to initiate melanin production (Eisenman et al, Virulence 2:329–336, 2011). This external supply of L-DOPA is crucial for promoting melanin biosynthesis and allows researchers to study the pigmentation process under controlled laboratory conditions. This melanin production plays a key role in the ability of Cryptococcus to survive and thrive in the host and protect against reactive oxygen species (ROS) and other environmental stresses (Kumari et al, Arch Microbiol 206:355, 2024). The presence and function of melanin in Cryptococcus are critical to understanding its pathogenicity, making it an important subject of research in fungal biology and infectious diseases (Chrissian et al. J Biol Chem 295(7):1815–1828, 2020). This chapter provides detailed protocols for studying melanin formation in Cryptococcus sp., including the preparation of minimal media (MM) for optimal melanin synthesis. The process of melanin formation is described, highlighting the biochemical pathways involved and emphasizing the role of laccase in the conversion of L-DOPA to melanin. This chapter also discusses the quantification of melanin by measuring grayscale levels, which is an effective means of assessing melanin content in fungal cultures. In this method, fungal cultures grown in the presence of L-DOPA are imaged and the grayscale intensities of the images captured under the microscope are analyzed, providing a simple yet reliable approach to quantify melanin production. By understanding the mechanisms of melanin production and its quantification, this chapter aims to provide valuable insights into how melanin contributes to Cryptococcus pathogenicity and offers potential therapeutic targets to combat Cryptococcus infections.