Slow Cooker Steak Fajitas with Homemade Fajita Seasoning

Name: Slow Cooker Steak Fajitas
Prep time: 10 min
Cook time: 480 min
Total time: 490 min
Ingredients: 2 lbs flank steak; 1 green bell pepper; 1 red bell pepper; 1 white onion; 10 oz salsa; 2 tbsp fajita seasoning; 6 flour tortilla shells

42 Comments / By Stephanie / January 28, 2020

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

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I love using the slow cooker for meals at any time of the year and any night of the week. When it’s hot outside, slow cooking is 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 meal perfect for busy weeknights.

When I suggested crock pot steak fajitas, (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 fajita 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 slow cooker fajitas 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 and uses simple ingredients that most people have around the kitchen. I make it in large batches and keep the rest in an airtight container for other recipes.

Serving Suggestions & Tips

Plan your cooking time when preparing the meal. It cooks better if you can start this early and let it cook on low for 6-8 hours.
Swap the flour tortillas for corn tortillas if you prefer them or any tortillas of your choice.
If you can’t get flank steak, try using skirt steak or another tender steak for this meal.
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.
Add your favorite toppings such as cheese, sour cream, avocado, fresh cilantro, or green onions.
Add an extra kick to the meal by mixing in more chili powder, red pepper flakes, or topping with sliced jalapeno pepper.
If you like warm tortillas, make sure to warm those just before filling your fajitas.
Serve with a side of refried beans and Mexican rice.
I used green pepper and red peppers, but you can also use yellow peppers or orange peppers.
If you don’t have fajita seasoning, you can substitute it with taco seasoning.

Make-Ahead Slow Cooker Steak Fajitas Recipe

Mix the beef strips, sliced vegetables, fajita seasoning, and salsa together and freeze in a bag. Freeze for up to 3 months.
Thaw two nights before cooking in the refrigerator.
Dump everything in the slow cooker in the morning to cook.
Note: this may add a small amount of cooking time to your recipe.

Slow Cooker Steak Fajitas Step by Step

Ingredients

2 lbs flank steak
1 green bell pepper
1 red bell pepper
1 white onion
10 oz salsa
2 tbsp fajita seasoning
6 flour tortilla shells

Preparation

Slice steak into thin strips. Then slice the onion and bell peppers 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 fajita 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.

Use tongs to put some of the meat and vegetables on flour tortillas. 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)

Slow Cooker Beef Fajitas Leftovers

Storage: Remove the fajita meat and vegetables from the slow cooker, drain as much as possible, and place them in an airtight container. Refrigerate for 2-3 days.

Reheating: For the best results, reheat the meat and vegetables in a medium saucepan or large skillet over medium-high heat until warmed through, about 5-10 minutes.

Freezing: Allow the leftovers to cool completely before placing them in a freezer-safe bag. Freeze for up to 3 months. Thaw overnight in the refrigerator then reheat in a saucepan or skillet.

Recipe

Originally Published On: August 22, 2018

Last Updated On: October 14, 2024

Slow Cooker Steak Fajitas

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

Prep Time 10

Cook Time 8

Total Time 8 10

Course:

Main Dish

Cuisine:

Mexican

Keyword:

fajita

steak

vegetable

Dietary Needs:

Dairy-Free

Egg-Free

Nut-Free

Meat:

Beef

Servings: fajitas

5 from 6 votes