Maggi spice sauce can be substituted with equal parts dark soy sauce and Worcestershire sauce, according to The Cook’s Thesaurus. Thai sweet soy sauce or even mushroom soy sauce can be used in place of the popular liquid condiment.
Many grocery stores have liquid seasonings that can be used in place of Maggi seasoning, such as Bragg Liquid Aminos and Knorr Liquid Seasoning. Because Maggi sauce is a concentrated, thin, and salty brown sauce, it’s best to stick to something comparable in flavour. Because most liquid spices include monosodium glutamate, or MSG, use them sparingly to avoid unpleasant side effects.