
Peel the corn and cut the kernels off the cob with a knife.
Break the cob in half and place it in a pot with milk and water.
Simmer for about 10 minutes to make a simple corn stock.
Melt butter in a pan and add most of the corn (reserve a small handful for texture later-optional) to cook for about 5 minutes.
Stir in flour and cook 1–2 min to remove raw taste, do not brown(Roux method).
Pour in the corn-cob stock made in step 1 through a sieve.
Bring to a gentle simmer, cook for about 5 min.
Stir in the onion koji (or consomme) and salt to taste.
Blend until very smooth with an immersion blender (or in batches in a stand blender).
Pass through a fine sieve, pressing with a ladle/spatula - optional.
Stir in cream and reheat gently to serving temperature—do not boil.
Ladle into bowls. Top with croutons, parsley, black pepper, and/or a drizzle of cream.