Easy Slow Cooker Steak Fajitas for Weeknight Dinners Tips, FAQ & printable recipe

Tips for success

For a more authentic flavor, consider adding a squeeze of fresh lime juice just before serving. The acidity helps to brighten the rich, savory flavors of the steak and peppers. You can also stir in some fresh chopped cilantro to add a pop of color and freshness. If you find the sauce is too thin, you can remove the meat and vegetables and simmer the remaining liquid in a small saucepan over medium-high heat until it reduces to your desired consistency.

If you prefer a smokier depth of flavor, add a teaspoon of smoked paprika or a dash of chipotle powder to your seasoning mix. While the packet seasoning is convenient, customizing your spice blend allows you to control the exact level of heat and salt.

Always store your spices in a cool, dark place to maintain their potency over time. When serving, warm your tortillas in a dry skillet for a few seconds to improve their texture and flavor before piling on the fajita mixture.

Variations

• Spicy Chicken Fajitas: Substitute the flank steak with thinly sliced chicken breasts. Adjust the cooking time to 3 hours on low to ensure the chicken stays juicy and does not dry out.
• Vegetarian Fajitas: Omit the steak and add two extra bell peppers, a sliced zucchini, and a drained can of black beans. Cook for 2 hours on low until the vegetables are tender.

Storage and make-ahead

Fridge

Store in an airtight container in the refrigerator for up to 3 days. Ensure the food cools to room temperature within 2 hours before refrigerating.

Freezer

Freeze in a sealed, freezer-safe container for up to 2 months. Thaw completely in the refrigerator before reheating.

Reheat

Reheat gently in a saucepan over medium heat, adding a splash of broth if necessary to maintain moisture, until heated through to 165°F (74°C).

Allow any leftovers to cool to room temperature for no more than two hours before transferring them to an airtight container. Properly stored, the fajita mixture can be kept in the refrigerator for up to three days. For longer storage, you can freeze the cooked steak and vegetables in a freezer-safe bag or container for up to two months. When ready to eat, thaw the mixture in the refrigerator overnight before reheating it gently on the stovetop or in the microwave.

You can prepare the ingredients up to 24 hours in advance. Slice the steak, peppers, and onions, and store them in separate airtight containers in the refrigerator. When you are ready to cook, simply assemble the layers in the slow cooker as directed.

This saves significant prep time on busy days. You can also mix the seasoning packet with the broth ahead of time, but do not combine the meat and vegetables with the liquid until you are ready to start the slow cooker.

Serving ideas

Serve these steak fajitas hot, directly from the slow cooker or transferred to a warm serving platter. Provide a variety of classic accompaniments such as warm flour or corn tortillas, sour cream, shredded cheese, guacamole, and fresh salsa.

Setting up a DIY fajita bar allows everyone to customize their meal to their liking. The tender steak and flavorful vegetables are perfect for wrapping, or you can serve them over a bed of cilantro lime rice for a hearty, filling meal.

Consider serving the fajitas with a side of black beans or a crisp green salad to balance the meal. The combination of textures—soft, tender meat and slightly tender-crisp vegetables—works beautifully with the creaminess of avocado and the tanginess of lime.

Ensure all toppings are fresh and chilled to provide a contrast to the warm, savory fajita filling. This versatile dish is perfect for casual dinners and can be easily scaled up or down depending on the number of guests you are serving.

Frequently asked questions

Recipe card

Easy Slow Cooker Steak Fajitas for Weeknight Dinners

Prep 10 minCook 4 hRest 5 minTotal 4 h 15 minServes 4

Ingredients

• 1 lb flank steak, sliced into thin strips
• 3 bell peppers, sliced
• 1 onion, sliced
• 1 packet fajita seasoning
• 1 cup beef broth

Instructions

1. Place the sliced flank steak strips into the bottom of the slow cooker. Add the sliced bell peppers and onions on top of the meat in an even layer to ensure they cook through properly during the slow cooking process.
2. Sprinkle the entire packet of fajita seasoning over the peppers and onions. Pour the beef broth carefully over the mixture to help create a savory cooking liquid that will keep the steak tender and flavorful.
3. Cover and cook on low for 4 to 6 hours. Once the steak reaches an internal temperature of at least 145°F (63°C), remove the meat and vegetables from the cooker. Let the steak rest for at least 3 minutes before serving to ensure maximum tenderness.

Estimated nutrition per serving

Calories

320

Protein

28 g

Carbohydrates

12 g

Fat

18 g

Fiber

3 g

Sugar

5 g

Sodium

650 mg

Automatic estimate from the ingredient list, not laboratory-verified.