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Instapot Tacos al Pastor – Low Carb

Instapot Tacos al Pastor – Low Carb

Al pastor is the iconic Mexico City taco, showcasing a stack of pork that has been marinated for days, cooked on a rotating spit and then sliced and crisped to order.  If you want that same robust flavor but are lacking in specialized equipment and time, try this version which uses the instapot! Flavored with fresh Mexican spices, it can certainly be a credible stand-in for the authentic Mexican al pastor.

Low carb tacos made with slow cooked pork shoulder
Low carb tacos made with slow cooked pork shoulder
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What are Tacos Al Pastor?

Traditional tacos al pastor are made from pork marinated in spices on a vertical grill spit over a layer of pineapple and onions. The meat is layered on to the spit and shaved off in ultra thin strips, lightly crisped, and folded into tortillas to make the tacos.

I just discovered that you can actually buy a grill spit for your own usage- like this one on amazon, but this is not necessary, and the recipe below using the instant pot will still get you the same great flavor.

Are There Really Different Types of Tacos Al Pastor?

The pork shoulder is the star of any al pastor recipe and it needs to be cooked to the tender stage, regardless of the cooking method. The instant pot can be an effective method for getting the tenderness, and then it is a matter of whether you want to crisp it to finish or just stir into the sauce.

Depending on the spices and how you serve the tacos, there are actually four typical variants of the taco al pastor.

Taco 1: Traditional Taco Al Pastor

The most recognizable of the al pastor versions, the traditional taco is most closely related to the Lebanese gyro “taco”. The main difference between the Lebanese version and the taco al pastor is, of course, the taco al pastor is served in a corn tortilla.

Taco 2: The Purista Taco

The main difference between the purista taco and the traditional style is the addition of a little adobo in the marinade. The purista also has chiles and achiote, but typically does not have pineapple added.

Taco 3: The Trompo Rojo Taco

Trompo rojo literally means, “red spinning top”. Which is no coincidence, as this version has more achiote added to the marinade to give it a deeper red color. This version is more typically found in the northeast parts of Mexico and the state of Monterrey.

Taco 4: The Guisado Taco

The pineapple is also optional in this lesser-known version of a taco al pastor. Guisado means “stew” in Spanish, and this version is actually not cooked on a grill spit like the other versions. The guisado taco is instead cooked in its own juices and fat. This version usually has more onion and can be slightly more charred than the other three versions.

Whichever version you choose (or combination of versions), traditional tacos al pastor call for the meat to be “crisped” or heated up on the stove top. Because I am striving to make everything as easy as possible these days, I simply added it to the Mexican-spiced sauce to finish. For a great carnitas recipe where you do crisp the pork, see this post.

What makes Instant Pot Tacos al Pastor Low Carb?

The recipe below has a “low-ish” carb count. Traditional tacos al pastor are marinated over pineapple slices and topped with fresh chopped pineapples. The pineapple is a problem for low carb or keto people. There is just no getting around how much sugar is in pineapple. In one cup of pineapple there are 22 grams of carbs and 16 grams of sugar. I tried to come up with a low carb alternative to the pineapple but really it is such a classic addition to al pastor that it’s probably better to go ahead and use pineapple, but just use it more sparingly.

I didn’t have any pineapple handy, and I needed to figure out how to use that quince paste that had been sitting in my pantry for so long, so this recipe uses quince paste instead of pineapple. I think using the quince paste really elevated this dish and made it unique. Quince is not low carb either however, so use your preferred fruit.

The other carb-heavy ingredient of course is the tortillas. If you are aiming to lower the carb count, you can either omit the tortillas all together or you can use a lower carb tortilla. This list compares the store-bought low carb versions and homemade low carb tortillas.

So, to keep the integrity of al pastor but still get the delicious taste, focus on using really fresh spices, and great pork and then just go easy on the pineapple. We used pickled red onions to up the flavor even more. Click here for an easy, quick pickled onion recipe.

What is the difference between al pastor and carnitas?

Though both carnitas and al pastor use pork, al pastor is typically marinated in various spices and then grilled, whereas carnitas are usually braised in fat or liquid.

What does tacos al pastor mean in English?

Literally, tacos al pastor means “shepherd style”. The style is similar to Middle Eastern gyro meat preparation- with meat cooking on a rotating vertical spit.

Instapot Tacos al Pastor- Low(ish) Carb

Low carb tacos made with slow cooked pork shoulder
5 from 8 votes
Prep Time 15 mins
Cook Time 45 mins
Servings 6
Calories 244


  • 2-3 lbs pork shoulder cut into bite-size cubes
  • 1 tsp mineral salt
  • 3/4 cup water
  • 2-3 Tbsp olive oil
  • 1 med onion chopped
  • 4-6 cloves garlic smashed with knife and then minced
  • 1 tsp dried oregano
  • 1 tsp ground cumin
  • 1/4 tsp ground cloves
  • 1 Tbsp achiote paste
  • 1/8 cup smoked pepper blend
  • 1/2 tsp pepper
  • 1/3 cup vinegar white distilled or sherry vinegar
  • 1/4 cup quince paste alternative of pineapple
  • 1 1/2 cup liquid left in instapot from pork
  • 1 cup pickled red onions and cilantro optional additions/garnishes


  • Add the cubed pork to the instapot, sprinkle with salt and add 3/4 cup water.  Close lid and turn instapot setting to meat for 30 minutes
  • About 10-15 minutes before instapot pork is done, start the onion-spice mixture.  Add oil to a large skillet and turn to med-high heat.  Add chopped onion and saute for about 5 minutes or until caramelized. Add mashed garlic and cook 30 seconds.  Add all spices (through pepper) and stir into onion mixture for 30 seconds to toast and blend.
  • Add vinegar to hot skillet mixture.  Add quince paste and melt into the onion mixture, stirring in thoroughly.  
  • When instapot pork is done, open and remove liquid (pork juices and water) from bottom of instapot and add to onion mixture in skillet over med-high heat.  Add pork chunks and stir thoroughly, coating pork cubes with onion-spice mixture.
  • Serve in low carb tortillas with pickled onions and cilantro garnish.


Calories: 244kcalCarbohydrates: 18.6gProtein: 10.3gFat: 15.5gSugar: 9.3g
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