Step 1

If Using Spent Chicken Carcass and Vegetables From Chintan Ramen Broth Recipe: Place spent chicken carcass in a pressure cooker and cover with 6 1/4 cups (1.5L) water. (No matter what, be sure not to exceed the max-fill line of your cooker.) Bring to high pressure and cook for 1 hour and 20 minutes. Allow pressure to release naturally.

Step 2

Using an immersion blender, blend contents of pressure cooker into a porridge-like slurry (see note). Alternatively, transfer contents of pressure cooker in batches to a high-quality countertop blender and blend. You can also use a wooden spoon or potato masher to break up and crush the chicken parts in the pot into small bits; however, you will then need to boil the mixture over high heat, stirring periodically, for 30 minutes in order to emulsify the broth.

Step 3

Working in batches, pour mixture through a fine-mesh strainer directly into mixing bowl filled with spent vegetables and kombu from chintan broth. Press firmly on solids to extract as much liquid as possible. Discard strained chicken solids.

Step 4

Let broth steep for 30 minutes. Strain broth through a fine-mesh strainer into a clean mixing bowl, pressing firmly on vegetables to extract as much broth as possible. Discard vegetables. Transfer broth to airtight containers and refrigerate.

Step 5

If Using Fresh Chicken and Fresh Vegetables: Place chicken in a pressure cooker and cover with 6 1/4 cups (1.5L) water. (No matter what, be sure not to exceed the max-fill line of your cooker.) Bring to high pressure and cook for 2 hours. Allow pressure to release naturally.

Step 6

Using an immersion blender, blend contents of pressure cooker into a porridge-like slurry (see note). Alternatively, transfer contents of pressure cooker in batches to a high-quality countertop blender and blend very briefly, just to break up larger bones. You can also use a wooden spoon or potato masher to break up and crush the chicken parts in the pot into small bits; however, you will then need to boil the mixture over high heat, stirring periodically, for 30 minutes in order to emulsify the broth.

Step 7

Working in batches, strain chicken mixture through a fine-mesh strainer directly into a large heatproof mixing bowl, pressing firmly on the mixture to ensure that all the liquid has been extracted. Discard chicken solids.

Step 8

Add broth to a pot and bring mixture to a boil over high heat. Turn off heat and add leek, onion, carrot, garlic, and ginger. Stir mixture once and add kombu. Let steep for 40 minutes.

Step 9

Pour broth through a fine-mesh strainer into a clean, large heatproof mixing bowl, pressing on solids to extract as much liquid as possible. Discard vegetables. Transfer broth to airtight containers and refrigerate.