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Dinner · Part 2 of 3: Instructions

Crockpot Garlic Butter Steak Bites and Pepper Jack Fajitas Step-by-step instructions

A rustic slow cooker filled with tender steak bites, colorful peppers, and melted pepper jack cheese.
Prep
Cook
Total
Serves
6
Includes 3 min resting

Before you start

Before starting, ensure all vegetables are washed and sliced uniformly to promote even cooking. Cube the sirloin steak into pieces roughly one inch in size, trimming any excess gristle if necessary.

Have the fajita spices measured out and the butter cut into small cubes. Ensure the slow cooker is clean and positioned in a safe, dry area on the counter, away from the edge, to prevent any accidents during the extended cooking time.

Ingredients at a glance (11)
  • 2 lb top sirloin steak, cut into bite-sized cubes
  • 3 bell peppers (green and red), sliced
  • 1 yellow onion, sliced
  • 6 cloves garlic, minced
  • 2 tbsp fajita spice
  • 4 tbsp butter (half stick), cubed
  • 2 cups pepper jack cheese, shredded
  • flour tortillas, warmed, for serving
  • sour cream, for serving
  • diced avocado, for serving
  • fresh cilantro, for serving

Instructions

Initial Layering

  1. Layer the Crockpot
    Place the cubed top sirloin steak into the base of the slow cooker. Add the sliced bell peppers, sliced yellow onion, minced garlic, fajita spice, and cubed butter on top of the steak to prepare for the slow cooking process.
    Look for The slow cooker insert should be layered evenly with the steak at the bottom and vegetables and seasonings on top.
    Tip Ensure the butter is distributed in small cubes for even melting throughout the cooking cycle.

At the start, the slow cooker should be filled with the raw steak cubes at the bottom, topped with a colorful arrangement of bell peppers and onions. The garlic, spices, and butter cubes are spread evenly over the top. The kitchen should smell fresh and aromatic as the spices begin to settle. Ensure all components are neatly arranged so that the butter will melt down through the layers during the cooking process.

Slow Cooking

  1. Slow Cook the Steak
    Cover the slow cooker with the lid and set to high heat. Cook the steak mixture for three hours until the beef is tender and the butter and juices have combined into a rich au jus. Ensure the steak reaches an internal temperature of 145°F (63°C) and let the meat rest at least 3 minutes before proceeding.
    Look for The beef should be cooked through and tender when pierced with a fork.
    Safe temperature 145°F (63°C) internal temperature (steaks, chops and roasts)
    Tip Avoid lifting the lid during the cooking process to maintain a consistent temperature and moisture level.

After three hours on high, the kitchen will be filled with the savory scent of garlic and cooked beef. The beef should be tender, and the bottom of the slow cooker should contain a significant amount of rich, flavorful au jus created by the melted butter and rendered beef fat.

The peppers and onions should be soft and fully integrated into the flavorful liquid, indicating that the base is ready for the cheese topping.

Final Melt

  1. Melt and Serve
    Open the lid and sprinkle the shredded pepper jack cheese over the entire mixture. Replace the lid for a few minutes until the cheese is completely melted and bubbly. Serve the steak bites and vegetables with warm flour tortillas, sour cream, diced avocado, and fresh cilantro.
    Look for The cheese should be fully melted and forming gooey strings when stirred.
    Tip Use a large spoon to incorporate the melted cheese into the steak and vegetables just before serving.

Once the pepper jack cheese is added, the final phase involves watching for the cheese to become completely molten and bubbly. This usually takes just a few minutes of covered resting.

The final dish should look vibrant, with the melted cheese creating a creamy coating over the steak and vegetables. The mixture should be hot throughout, and the aroma should be intensely savory, signaling that the meal is ready to be served immediately.

Common mistakes

A common mistake is overcrowding the slow cooker, which can lead to uneven cooking and excess liquid accumulation. Ensure there is enough space for heat to circulate.

Another error is checking the dish too frequently; opening the lid releases steam and lowers the internal temperature, significantly extending the cooking time. Finally, avoid using pre-shredded cheese if possible, as it often contains anti-caking agents that prevent it from melting into a smooth, creamy consistency.

How to tell it’s done

The steak is done when it reaches an internal temperature of at least 145°F (63°C). At this point, the meat should be tender enough to be easily pierced with a fork. The juices should be clear, and the vegetables should be soft but not mushy. Always use a meat thermometer to check the thickest part of a steak piece to ensure it has reached the safe minimum temperature before serving.

  • Steaks, chops and roasts: 145°F (63°C) in the thickest part, then a 3-minute rest

Coming up in Part 3: common questions

  • Can this be made with chicken instead of steak?
  • Is it possible to use frozen bell peppers?
  • What is the best way to keep the tortillas warm?

Also in Part 3: variations (Spicy Jalapeño Variation, Tex-Mex Bean Addition), storage and make-ahead, and the printable recipe card.

Up next · Part 3 of 3

2 variations · storage & make-ahead · 3 answers · printable card

Tips, FAQ & printable recipe (Part 3)← Back to the ingredients (Part 1)