OX SKIN & OX TENDON PREPPING & STORAGE GUIDE
Preparing ox skin and tendon ahead of time is a very smart kitchen shortcut. Because these cuts require hours of simmering to transform dense connective tissue into melt-in-your-mouth gelatin, processing them in large batches ensures you always have a rich, glossy base ready in your freezer. This base can be instantly thawed for Kare-Kare, high-collagen beef stews, or rich noodle soups.
PROCESSING & PREP TIME
Prep & Cleaning Time: 20 minutes
Simmering Time: 2.5 to 3.5 hours (mostly hands-off)
Storage Life: Up to 3 months in the freezer
INGREDIENTS
2–3 lbs Ox Skin (cleaned and scraped)
2–3 lbs Beef Tendon (cleaned)
2 thumb-sized pieces of ginger, sliced and crushed
1 head of garlic, halved horizontally
4–5 dried bay leaves (laurel)
Water for boiling
Tools: Fine-mesh strainer, sharp knife, freezer-safe containers or heavy-duty ziplock bags, and a measuring cup.
STEP-BY-STEP GUIDE
1. The Purge (Essential Cleaning Step)
Ox skin and tendon can carry strong, gamey odors if not purged.
Place the raw skin and tendon in a large pot and cover completely with cold water.
Bring to a rolling boil over high heat and let it vigorously boil uncovered for 10 to 15 minutes. A lot of gray scum and foam will rise to the surface.
Drain the pot completely into the sink. Clean the pot thoroughly to remove any residue.
Rinse the blanched skin and tendon under cold running water, scraping away any remaining loose fat, hair, or impurities from the skin.
2. The Collagen Simmer
Return the cleaned meats back into the clean pot.
Fill the pot with fresh water until the ingredients are submerged by at least 2 to 3 inches.
Toss in the crushed ginger, halved garlic head, and bay leaves.
Bring to a boil, then immediately turn the heat down to low. Cover with a tight-fitting lid and let it simmer gently for 2.5 to 3.5 hours.
Testing for doneness: The tendon should feel soft, rubbery-gelatinous, and yield easily when poked with a fork. The ox skin should be completely tender and pliable, not tough or chewy.
3. Separation and Portioning
The Broth: Remove the meats from the pot. Strain the remaining liquid through a fine-mesh sieve into a large bowl to catch the aromatics. Discard the ginger, garlic, and bay leaves. What you have left is a liquid gold, collagen-infused broth that will solidify into a jelly once cooled.
The Meats: Let the skin and tendon cool slightly so they are safe to handle. Using a sharp knife, slice them into uniform, bite-sized pieces (about 1-inch squares or strips).
Storage & Freezing Instructions
Submerging the sliced meats directly into the liquid before freezing is essential. The broth acts as a natural protective shield, completely surrounding the pieces so dry freezer air cannot cause freezer burn or turn the texture woody and leathery.
Let it Cool: Allow the sliced meats and the strained broth to come down completely to room temperature. Do not pack hot ingredients directly into freezer bags.
The Ox Skin Capsules: Grab your freezer containers or heavy-duty ziplock bags. Portion your desired amount of sliced ox skin into a bag, then pour enough collagen broth directly over the pieces so they are completely submerged. Seal tightly, forcing out any excess air. Label as "Ox Skin + Broth" with the date.
The Beef Tendon Capsules: Using a separate set of bags or containers, portion your sliced beef tendon. Pour the remaining collagen broth over the tendon pieces until they are completely submerged. Seal tightly, forcing out excess air. Label as "Beef Tendon + Broth" with the date.
Freeze: If using bags, lay them flat on a baking sheet to freeze so they solidify into neat, flat blocks that stack efficiently like books. Freeze for up to 3 months.
When you are ready to cook:
Simply pull one capsule out of the freezer and thaw it in the fridge overnight (or submerge the sealed bag in warm water for a quick thaw). Empty the contents straight into your pan, and your restaurant-quality, collagen-thickened sauce base is already done in 0 minutes of stove time!
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