Conventional livestock farming is responsible for the emission of substantial quantities of potent greenhouse gases, including methane (CH₄) and nitrous oxide (N₂O), which are significant contributors to global warming. As an alternative, artificial meat has the potential to significantly reduce greenhouse gas emissions compared with traditional livestock production whilst minimizing land and water use. The objective of this study is to develop and optimize a dual-nozzle 3D bioprinting system for artificial meat production using sustainable, algae-derived biomaterials. A syringe-based dual-nozzle printer was designed and fabricated with Arduino-based control systems, enabling independent deposition of meat and fat components to replicate complex tissue structures. Notably, alginate was extracted directly from brown algae through an eco-friendly process including washing, drying, acid treatment, and leaching, goffering a sustainable alternative to commercial reagents. The extracted alginate was formulated into 3% and 5% bioink solutions and mixed with processed meat products (spam) to evaluate printability. To address gelation-induced nozzle clogging―a critical challenge in bioink extrusion―gelation timing was optimized by performing external cross-linking with calcium chloride after printing, rather than during extrusion. This strategy successfully prevented print failures while maintaining structural integrity. Experimental optimization revealed that 3% alginate concentration provided the optimal balance between printability and structural stability, while 5% caused excessive viscosity leading to nozzle blockage. The dual-nozzle system enabled precise control of tissue composition and architecture, demonstrating the feasibility of creating heterogeneous meat structures with distinct fat and muscle regions. These findings demonstrate that brown algae-derived alginate combined with a strategically designed printing protocol can overcome major technical barriers in artificial meat fabrication, thereby enhancing precision and efficiency in alternative protein production. This work contributes to sustainable food manufacturing by integrating renewable marine biomaterials with advanced bioprinting technology, providing a foundation for future innovations in artificial meat production and addressing global challenges related to food security and environmental impact.