The paper presents the redesign, construction, and validation tests carried out on a prototype of a parabolic solar oven stove for cooking in a tropical climate. The system was designed with a concentration factor of 3 sols and an opening angle of 90° composed of a parabolic dish of 28 triangular sections of the galvanized sheet of 30 gauge, with a total diameter of 1.28 meters, to which a self-adhesive reflective film of polyethylene terephthalate with a reflection factor of 95% was fixed. A steel pot with a volumetric capacity of 3000 ml covered with matt black high-temperature semi-selective paint (91% absorptivity), a 3/4-inch steel support structure, and an endless-crown screw positioning mechanism was used. The functional tests were executed between 10:00 and 16:00 hours with different volumes of water and oil, for which the study parameters were recorded every 5 minutes. The results showed that the quality and taste of the food are satisfactory, reaching boiling temperature (95 °C) in the case of water and 260 °C for oil, in times between 20 and 70 minutes. In addition, thermal efficiencies were obtained in the system of between 32.4% and 51.2% with a maximum operating temperature of 265 °C.