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Meaty with a dash of veggies

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Callos (slow cooker recipe)

Beef recipe by Connie Veneracion | Last updated: 08.31.2026
No AI was used in the creation of this recipe.
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The Filipino version of the Spanish beef tripe stew, callos is often served as a special occasion dish because of the laborious cooking process. Using a slow cooker makes everything easier and the stew even tastier.
Callos (slow cooker recipe)
Course: Main Course
Cuisine: Modern Filipino
Tag: Beef stew, Beef tripe, Organ meat, Slow cooker

Cook’s notes

I had an old callos recipe that had undergone a few revisions, but there’s always room for improvement. This slow cooker callos beats the old recipe by ten notches.

But, first, what is callos?

It is a stew common in Spain. The meat is mainly beef tripe; blood sausage, bell peppers and chickpeas are almost always present. It is one of the many dishes that Spain introduced in its colonies, and the Filipinos adapted it with local twists.

About beef tripe

There are three kinds of tripe. All come from the cow’s stomach but each is from a different chamber.
There’s honeycomb tripe (so-called because the surface looks like a honeycomb), blanket tripe (smoother surface) and book or leaf tripe (thin leaves attached together on one side).
I’ve often used honeycomb tripe to cook callos in the past but I have discovered that blanket tripe is a better choice. It has more of that melts-like-butter texture when cooked to ultra tenderness.
Tripe is commonly bleached with a chlorine solution before it is sold (in the Philippines, at least). It’s a cleaning process more than anything else. But bleaching also gives tripe its whitish appearance. Pre-boiling the tripe with a little vinegar before cooking removes any lingering odor of chlorine.

Why is a slow cooker ideal for cooking callos?

Three reasons.
The first reason has to do with motion. On the stovetop, the heat at the bottom of the pot causes the liquid to rise and bubble, and make the pieces of meat dance around.
Callos in the slow cooker
The constant movement may cause the pieces of meat to break apart when they are already tender. Plus, because stirring is required to make sure that there is no scorching at the bottom of the pot, the additional agitation doubles the chances of breakage.
But because the stew barely simmers in the slow cooker and no stirring is necessary, it is possible to bring the meat to that level of tenderness that is literally melt-in-the-mouth but with very little chance of ruining the perfectly cut pieces.
Callos on the stovetop
The second reason is convenience. The callos cooked overnight while we slept. In the morning, I sauteed the vegetables in olive oil, dumped the cooked meat and sauce into the pot with the vegetables, and the callos was ready for the dining table.
The third reason is flavor. Stews are always better the next day after reheating but this slow cooker callos did not need to sit overnight in the fridge to allow the flavors to deepen. That happened inside the slow cooker.

Callos (slow cooker recipe)

Prep: 20 minutes mins
Cook: 15 hours hrs
Total: 15 hours hrs 20 minutes mins
Servings: 4 people
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Ingredients

  • 500 grams honeycomb or blanket beef tripe (1.1 pounds)
  • 700 grams bone-in beef kneecap (1.5 pounds) or use bone-in beef leg which is more traditional
  • 6 cups bone broth
  • 1 to 2 chorizo de Bilbao sliced into rings
  • 2 tablespoons minced garlic
  • ½ cup chopped onion
  • 1 bay leaf
  • 1 sprig oregano stripped
  • 2 bird’s eye chilies finely sliced
  • â…“ cup tomato paste
  • salt
  • pepper
  • 2 tablespoons olive oil
  • ½ cup cubed carrot
  • ½ cup diced bell peppers
  • ½ cup canned chickpeas (garbanzos), well drained
  • ½ cup sliced olives (optional but recommended)

Instructions

  1. Place the tripe and kneecap (bones and all) in a pot. Cover with water. Boil on the stovetop for 10 minutes. Drain. Throw out the water.
  2. Place the tripe and kneecap in the slow cooker. Pour in enough broth to cover. Cook on HIGH for three hours.
  3. Scoop out the tripe and kneecap. They will still be tough at this stage so use a sturdy knife. Cut the tripe into strips about an inch wide. Separate the kneecap bones from the meat and tendons. Cut the meat and tendons into strips.
  4. Take a cup of broth from the slow cooker and stir the tomato paste in it.
  5. Put the tripe and kneecap (including the bones) back into the slow cooker. Add the chorizo, garlic, onion, bay leaf, oregano, chilies and diluted tomato paste. Season with salt and pepper. Stir. Set the slow cooker to LOW and cook for another 12 hours.
  6. Heat the olive oil in a pot. Add the carrot cubes, diced bell peppers, chickpeas and olives. Cook over medium heat until the carrot cubes are cooked but still a little crisp. Sprinkle with salt and pepper.
  7. Fish out the bones from the slow cooker and discard. Pour the contents into the pot with the vegetables. Stir. Cook just until simmering.
  8. Serve your slow cooker callos with rice or bread.
    Callos (slow cooker recipe)
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About Connie Veneracion

Home cook and writer by passion, photographer by necessity, and good food, coffee and wine lover forever. I create, test and publish recipes for family meals, and write cooking tips and food stories. More about me and my umami blogs.

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