Step 1: Prepare the Bones (Blanching). Place all pork bones and trotters in a large stockpot. Cover with cold water and bring to a rolling boil over high heat. Boil for 10-15 minutes, skimming off any scum that rises to the surface. This step is critical for a clean-tasting, non-gamey broth and is key for the best ramen broth recipe.
Step 2: Clean the Bones. Drain the blanched bones in a colander. Rinse each bone thoroughly under cold running water, scrubbing off any remaining impurities, blood clots, or grey matter. Clean the pot as well.
Step 3: First Simmer. Return the cleaned bones to the clean stockpot. Add the quartered onion, halved garlic head, sliced ginger, and sake (if using). Cover with fresh cold water by at least 2-3 inches. Bring to a boil over high heat, then immediately reduce the heat to a gentle simmer. Cover loosely, leaving a small gap for steam to escape.
Step 4: Long Simmer. Simmer the broth for a minimum of 12-16 hours. The longer, the better for extracting collagen and flavor. Maintain a gentle simmer, ensuring the bones are always submerged. Add hot water as needed throughout the process to keep them covered. Skim off any fat or impurities that rise to the surface every few hours. This slow extraction is vital for the best ramen broth recipe.
Step 5: Add Kombu and Shiitake. About 2 hours before the simmering is complete, add the kombu and dried shiitake mushrooms. Do not boil the kombu aggressively; let it steep gently. Remove the kombu after 30-45 minutes to prevent bitterness, but leave the shiitake mushrooms.
Step 6: Strain the Broth. Once the broth has simmered for 12-16 hours and is milky white and rich, turn off the heat. Carefully remove all the bones and aromatics from the pot using tongs or a slotted spoon. You can pick off any remaining meat from the bones to use as a topping.
Step 7: Double Strain. Strain the broth through a fine-mesh sieve into another large pot or heat-proof container. For an even smoother broth, you can strain it a second time through cheesecloth. This step ensures a pristine final product for the best ramen broth recipe.
Step 8: Emulsify (Optional, but Recommended). For a truly creamy Tonkotsu, use an immersion blender or ladle portions into a regular blender (carefully, in batches!) and blend until emulsified. This breaks down the fats and gelatin, creating the characteristic milky, opaque appearance. Reheat if necessary.
Step 9: Seasoning (Tare). The broth itself is typically unsalted. Ramen broth is seasoned with a concentrated seasoning base called ‘tare’ (soy sauce tare, shio tare, miso tare) right before serving in the bowl. This allows for individual customization. You now have the base for the best ramen broth recipe!