Essential oils are aromatic, oily liquids derived from various parts of plants, including leaves, peels, bark, flowers, buds, and seeds. Volatile odoriferous oils are extracted through methods such as steam distillation and expression. The flavor and odor of essential oils vary based on the types and quantities of their components, especially in fragrant plants. The differing quantities that are extracted from various plants have an impact on the price of essential oils. In addition to aromatic ingredients, natural pigments contribute to their different colors. Essential oils, primarily sourced from plants, have long been recognized for their aromatic and medicinal benefits. The extraction and purification of essential oils from biomass food waste significantly enhance value addition and sustainable resource use. Various extraction techniques yield essential oils from different plants, with the botanical material determining the process used. The state and presentation of the material are also key factors to consider. The quality of an essential oil is largely determined by the extraction process, as improper extraction can alter or damage its chemical signature. The rapidly growing field of essential oils presents unique chemical compositions influenced by extraction methods and specific fungal species. Due to their abundance in various volatile molecules, these oils have potential uses in cuisine, cosmetics, and health. Ongoing research into their extraction techniques, chemical makeup, and therapeutic properties further underscores their potential. This chapter examines various approaches and procedures for obtaining essential oils from food waste, along with strategies for refining these oils to improve quality and marketability. It covers the importance of essential oils in manufacturing processes, the problems food waste poses to the environment, and the possibility of utilizing waste biomass to produce goods with added value. Additionally, the chapter explores potential research opportunities for enhancing these processes and evaluates the sustainability and economic aspects of extracting essential oils from food waste.