Overhead view of three flour tortillas topped with cooked fajita steak topped with cooked onions, green bell peppers, red bell peppers, and shredded cheese all on a wooden surface (with logo overlay)

Slow Cooker Steak Fajitas with Homemade Fajita Seasoning

Use your slow cooker to make delicious and easy steak fajitas with a homemade seasoning that is sure to be a hit with the family. 

I love using the slow cooker for meals at any time of the year. When it’s hot outside, it’s perfect because it doesn’t heat up the house like the stove and oven. In the cooler months (because let’s face it, there aren’t cold months in Houston), the slow cooker is an easy way to make delicious soups to warm you from the inside. Steak fajitas in the slow cooker is a great middle-ground type of meal.

When I suggested this meal, (adapted from here) Justin wasn’t too sure about it. He can be picky about the way his steak is cooked. We weren’t sure that the slow cooker would do the job. He likes his medium-rare, while I prefer mine medium-well. Luckily, the meat ends up having so much flavor and soaks up a lot of the juice in here. It stayed moist and didn’t get that tough texture overcooked meat tends to have.

For this recipe, you can use any salsa you want. This allows you to determine how spicy they are based on what type you purchase. I can’t handle spicy foods, so I used a mild picante sauce when we made this for ourselves. If Justin had his way, we would have used at least a medium, if not hot, salsa.

You can buy packaged fajita seasoning, but I suggest making your own. It’s quick and easy. Plus it’s made from spices and seasonings that most people have around the kitchen. I make it in large batches and keep the rest in an airtight container for other recipes. 

Step by Step

I was able to find some beef already cut into strips. This saved me some time and effort because it was ready to put in the slow cooker immediately. If you can’t find that, then start by slicing the meat into thin strips. Then slice all of the vegetables into strips as well.

Sliced white onion, green bell pepper, and red bell pepper on a light bamboo cutting board on a wooden surface

Add the meat and vegetables to the slow cooker and cover with the salsa. You can use more, but too much will make everything very soggy.

Overhead view of steak strips topped with sliced white onion, green bell pepper, red bell pepper, and salsa in a slow cooker on a wooden surface

If you plan to mix your own fajita seasoning, then combine all of the seasoning ingredients together.

Measuring spoon and tea spoon with fajita seasoning on a white background with seasoning around it

Sprinkle two tablespoons of fajita seasoning (whether homemade or from a packet) over everything in the slow cooker.

Overhead view of steak strips topped with sliced white onion, green bell pepper, red bell pepper, and salsa all covered with fajita seasoning in a slow cooker on a wooden surface

Stir all of the food in the slow cooker really well and cover. Cook on low for about 6-8 hours or high for 3-4 hours. I almost always do mine on the low setting as long as I have time.

Use tongs to put some of the meat and vegetables on a flour tortilla. You want to leave as much of the liquid off as possible. Otherwise, it makes your tortilla soggy and gross. Top with cheese, sour cream, cilantro, and any other desired toppings.

Overhead view of three flour tortillas topped with cooked fajita steak topped with cooked onions, green bell peppers, red bell peppers, and shredded cheese all on a wooden surface (vertical)

Recipe

Originally Published On: August 22, 2018

Last Updated On: January 28, 2020

Overhead view of three flour tortillas topped with cooked fajita steak topped with cooked onions, green bell peppers, red bell peppers, and shredded cheese all on a wooden surface

Slow Cooker Steak Fajitas

Use your slow cooker to make delicious and easy steak fajitas with a homemade seasoning that is sure to be a hit with the family. 
Prep Time 10 minutes
Cook Time 8 hours
Total Time 8 hours 10 minutes
Course: Main Dish
Cuisine: Mexican
Keyword: fajita, steak, vegetable
Servings: 6 fajitas
5 from 6 votes

Ingredients

  • 2 lbs beef
  • 1 green bell pepper
  • 1 red bell pepper
  • 1 onion
  • 10 oz salsa
  • 2 tbsp fajita seasoning
  • 6 tortilla shells
  • fajita toppings such as cheese, sour cream, cilantro (as desired)

Instructions

  • Slice the beef and vegetables into thin slices
  • Add meat, vegetables, and salsa to the slow cooker
  • Sprinkle with fajita seasoning and stir to coat
  • Cover and cook on low for 6-8 hours or high for 3-4 hours
  • Use a slotted spoon or tongs to remove the meat and vegetables and build your fajitas on a tortilla shell
  • Top with cheese, sour cream, cilantro, or any other desired toppings

Notes

Note: Nutrition facts are calculated without any toppings
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Nutrition Facts
Slow Cooker Steak Fajitas
Amount Per Serving (1 fajita)
Calories 474 Calories from Fat 297
% Daily Value*
Fat 33g51%
Saturated Fat 12g60%
Cholesterol 107mg36%
Sodium 533mg22%
Potassium 674mg19%
Carbohydrates 15g5%
Fiber 3g12%
Sugar 4g4%
Protein 28g56%
Vitamin A 999IU20%
Vitamin C 44mg53%
Calcium 59mg6%
Iron 4mg22%
* Percent Daily Values are based on a 2000 calorie diet.

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42 thoughts on “Slow Cooker Steak Fajitas with Homemade Fajita Seasoning”

    1. I thought the same, but I wanted it so decided to give it a try. My husband said that, since the steak is so thin and it’s mixed with other flavors, he doesn’t notice that it’s “overcooked” to him.

  1. First off, we LOVE fajitas!!! Second, I LOVE cooking with my crock-pot! Third, these look so yummy and easy – am betting I’ll try this before the school year gets too far along! 🙂

    1. Three exact reasons I decided to make these and have made them quite a few times! Slow cooker recipes are great for school days since it’s ready when you are!

  2. With my crazy busy life I should be using my slow cooker. It is just sitting on my shelve. My family would love this delicious fajita meal for sure. Thank you for the recipe!

  3. These fajitas Look delicious! You just gave me another reason to finally get myself a slow cooker! I can’t even think of turning the oven on these days in my small apartment!!

    1. You should definitely get a slow cooker. There are some great affordable options. Mine doesn’t have anything fancy, but it does what it needs to do and doesn’t heat up the kitchen with the oven running.

  4. These look great. However, I would try them with chicken because I know the beef industry is the biggest contributor to the world’s climate change issues.

    1. I understand completely. We don’t eat a lot of beef here for a few reasons, that being one of them. But steak is my husband’s favorite, so we get some only now and then.

  5. Fajitas are such a great dinner for my family because the kids can customize them how they want. Adding this to next week’s meal plan!

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