Prepare a cheese moldby lightly oiling a smooth glass container.
Pour all of the ingredientsexcept for the water and miso into a medium-sized saucepan.
Stir the ingredients, then turn the heat to medium.
Cook your cheese sauce over low heat for 6 minutes, stirring frequently. (It needs to boil for 6 minutes to fully melt and activate the agar agar.)
Mix the miso and wateruntil the miso is dissolved completely. Pour the mixture into the cheese sauce.
Stir the cheese sauceuntil the miso is incorporated.
Pour the cheeseinto the chosen mold.
Coolfor about 15 minutes on the countertop, then cover and refrigerate for 2-3 more hours, until it cools and sets completely.
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Notes
Once the cheese sauce begins to boil, turn the heat down so that it is bubbling, but not so hot that it will burn.
Be sure to stir the cheese sauce very frequently so it doesn't burn.
Simmer the cheddar cheese for 6 minutes to melt the agar agar and allow it to bind completely with the ingredients.
Adding the miso at the end avoids killing the beneficial probiotics in the miso.
Leave out the tapioca starch if you want a firm slice of cheese for crackers or to eat cold.
How to make meltable vegan cheddar:
Add all the ingredients to a saucepan, but use 1/4 cup of water instead of 1/2 cup, and 4 tsp of agar agar instead of 2 tbsp.
Heat the cheese sauce over medium heat until it begins to boil.
Turn down the heat until it is just barely bubbling and allow to boil for 5 minutes while stirring frequently.
Add 2 tbsp plus 1 tsp of tapioca starch (7 tsp) to 1/4 cup of cold water, stirring until dissolved.
Mix the miso into the starch and water until completely dissolved, then pour it into the cheese sauce.
Add the starch-miso-water mixture to the boiling cheese sauce while whisking, then cook for an additional 1 minute. (Your cheese will become very thick and stretchy).
Pour into a glass container and allow to cool uncovered in the refrigerator for at least 3 hours before shredding.