The pursuit of sustainable energy storage solutions has prompted investigations into materials capable of converting “Waste to Wealth.” Biomass reservoirs are recognized as valuable resources, spurring governmental policy initiatives aimed at energy generation and storage. In this study, we investigate the electrochemical performance of supercapacitors utilizing soot derived from various waste fuel sources such as Ghee, Castor oil, Coconut oil, Mustard oil, Sunflower oil, etc., revealing their capacitance. Employing a flame deposition method for soot collection and a 3D-printed two-electrode set-up with Stainless Steel mesh current collectors, the study compares incineration timings, morphology, and electrochemical performance. The carbon material's unique microstructure is characterized, elucidating its role in enhancing charge storage mechanisms and achieving a specific capacitance of ~ 83 F/g. These soot-derived supercapacitors offer a sustainable solution, utilizing readily renewable resources from daily combustion wastes while facilitating fast electrolyte-ion migration on their surface. With applications ranging from electric vehicles to renewable energy systems, these eco-friendly supercapacitors present a promising avenue for sustainable energy storage, addressing the global demand for cleaner alternatives and contributing to a greener energy future.