according to this it says that the cooking exp is x20 but i dont see any increase when cooking

+28.21% Increased Monster Stats, +200% Trapdoor Minimum Monster Level, 20x Cooking Experience, +40% Trapdoor Maximum Monster Level, +11% Map Final Chest Quality, +6% Better Item Drop Quality, +11% Experience Gained Bonus Event in progress for 3 days, 0 hours

the 20x experience is added to your character level; so your samurai will get the 20x exp when you cook something