Soy sauce is one of the best substitutes for sweet soy sauce made of fermented soybeans and has a similar flavor to sweet soy sauce. While modern oyster sauce may have sugar, it is not sweet but rather intensely savoury and salty, like the ocean. Add a quarter part maple syrup and a splash of dark soy sauce if you want to use it as a substitute for sweet soy sauce.

Kecap Sedaap". Wings Food (in Indonesian). Archived from the original on 2020-02-24 . Retrieved 2016-02-15.

Spices: I like to add a single star-shaped pod of star anise. It adds spice and depth to the sauce without overpowering the sweet, salty soy taste. You can also add a small piece of cinnamon. You can use it in a 1:1 ratio as a substitute for sweet soy sauce in the recipes that calls for sweet soy sauce. Don’t use honey with strong floral flavors because it will alter the flavor of the sauce. 3. Coconut aminos It is made of fermented soybeans, sesame oil, garlic, vinegar, sweetener, five-spice powder, and chilies. However, there are also other variants made with different ingredients.

Don’t use dark soy sauce as a direct substitute for sweet soy sauce. First, add a quarter part sugar (palm, coconut or brown sugar) or maple syrup to match the sweetness of kecap manis. 9. Oyster sauce

Nagi from RecipeTin Eats has a great post on the main types of soy sauce if you are interested in learning more.

Substitutes for sweet soy sauce include soy sauce and brown or palm sugar, soy sauce, and honey, coconut aminos, oyster sauce, or some of the following products. While some people might confuse it for soy sauce or tamari, it’s definitely not the same thing, and comes with loads of complexity, spice notes and a sweetness that really sets it apart from its salty relatives. What is Ketjap Manis? Mix one part soy sauce with one part maple syrup by volume. For example, take one tablespoon soy sauce and add one tablespoon maple syrup. Stir until well combined. This sauce is a common ingredient in marinades, stir-fries, stews, soups, dressings, as a dipping sauce, or as a condiment for dumplings, noodles, tofu, and fish.Besides the national brands, there are numerous regional brands, such as Ikan Lele in Pati, Mirama in Semarang, Orang Jual Sate in Probolinggo, Siong Hin (SH) in Tangerang, Tomat Lombok in Tegal, etc. [7] More or less, there are a hundred regional brands of kecap manis. [8]