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This Crockpot Steak Fajita Recipe Is An Easy Low Carb Dinner You Can Make In Your Instant Pot Or Slow Cooker

  • Author: Heather Burnett
  • Total Time: 3 hours, 10 minutes
  • Yield: 6 1x
  • Diet: Gluten Free


There are only 5 ingredients in this crockpot steak fajita recipe: simple, delicious and low-carb, paleo, and whole30 approved! 



2 pounds beef, sliced

2 bell peppers, sliced

1 large onion, sliced

15 ounces diced tomatoes

2 tbsp fajita seasoning (store-bought or homemade) 

1 tbsp oil (if you’re going the Instant Pot route)

1/4 cup beef broth or water (if you’re going the Instant Pot route)

Homemade Fajita Seasoning 

1 tablespoon chili powder

1 ½ teaspoons cumin

1 teaspoon pepper

1 teaspoon salt

½ teaspoon paprika

½ teaspoon oregano

¼ teaspoon onion powder

¼ teaspoon garlic powder

¼ teaspoon red pepper flakes


Crockpot Instructions

Add all ingredients to your crockpot and stir.

Cook on high for 2-3 hours, or on low for 4-6 hours.

Instant Pot / Pressure Cooker Instructions

Turn on your pressure cooker and select the Sauté setting. Add the oil and the flank steak. Cook for 2-4 minutes or until beef is browned. Remove the beef.

Add the sliced onions and bell peppers. Cook for 3-5 minutes or until vegetables are soft. Next, add the beef broth or water and scrape the bits off the Instant Pot’s bottom with a wooden spoon. Return the beef to the pot and add the diced tomatoes and fajita seasoning. Stir and close the lid – and seal the valve. 

Adjust the setting to high pressure and cook for 9 minutes. Release, stir, and serve. And enjoy! 

  • Prep Time: 10 minutes
  • Cook Time: 3 hours
  • Category: dinner
  • Method: crockpot, Instant Pot
  • Cuisine: American

Keywords: keto dinner, low carb dinner, crockpot recipe, slow cooker recipe, Instant Pot recipe