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Dinner · Part 2 of 3: Instructions

Slow Cooker Fajita Turkey Tenderloin for an Easy Dinner Step-by-step instructions

A white plate filled with shredded fajita turkey tenderloin and colorful peppers.
Prep
Cook
Total
Serves
4
Includes 5 min resting

Before you start

Before starting, ensure the slow cooker insert is clean and properly seated in the base. Take the turkey tenderloins out of the refrigerator no more than 30 minutes before you are ready to begin assembling the meal. Have your forks ready nearby for the final shredding phase so you can process the cooked meat efficiently without letting it lose too much heat during the transition.

Ingredients at a glance (4)
  • 1 1/2 lb turkey tenderloins
  • 2 cups frozen sliced bell peppers and onions
  • 1 packet fajita seasoning
  • 1 cup chunky salsa

Instructions

Layering the ingredients

  1. Assemble the slow cooker
    Place the raw turkey tenderloins at the bottom of the slow cooker insert. Distribute the frozen sliced bell peppers and onions evenly over the turkey, then sprinkle the fajita seasoning packet over the top of the vegetables.
    Look for Ingredients are layered in the cooker
    Tip Ensure the turkey is in a single layer to promote even cooking throughout the process.

At this stage, the slow cooker should be neatly layered with the turkey at the base, followed by the frozen vegetables and the seasoning. The salsa should be poured over everything to ensure even coverage.

Ensure the ingredients are arranged to allow heat to circulate properly, and confirm the slow cooker is plugged in and set to the correct low temperature setting before covering the lid.

Slow cooking the turkey

  1. Add sauce and cook
    Pour the chunky salsa over the entire mixture. Cover the slow cooker and cook on low for 4 hours or until the turkey is fully tender and cooked through to an internal temperature of 165°F (74°C).
    Look for Salsa is poured over the ingredients
    Safe temperature 165°F (74°C) internal temperature (poultry)
    Tip Avoid lifting the lid during the first 3 hours to maintain the consistent internal temperature required for slow cooking.

During the cooking phase, the slow cooker will begin to emit a savory aroma of spices and cooked vegetables. The salsa should be bubbling gently around the edges.

Check that the lid remains firmly closed throughout the entire duration to ensure the turkey reaches the necessary temperature. The vegetables should look soft and integrated into the salsa sauce, indicating they are ready for the final step.

Shredding and finishing

  1. Shred and serve
    Remove the cooked turkey tenderloins to a clean plate. Use two forks to shred the meat into bite-sized pieces, then return the shredded turkey to the slow cooker to toss with the cooked vegetables and salsa juices before serving warm.
    Look for Turkey is shredded and combined
    Tip Let the turkey rest for 5 minutes after removing from the slow cooker before shredding to keep the meat juicy and flavorful.

Once the turkey is removed to a plate, it should look tender and glossy. After shredding with two forks, the meat should be combined back with the salsa and vegetable mixture.

The final dish should appear well-coated and steaming, with the peppers and onions distributed throughout the shredded turkey. Check that the mixture is heated through and the consistency is to your liking before serving immediately.

Common mistakes

A common mistake is overcrowding the slow cooker, which can lead to uneven cooking and excess moisture that dilutes the seasoning. Another error is removing the lid too frequently, which resets the internal temperature and extends the cooking time significantly.

Avoid adding extra liquids like water or broth, as the turkey and vegetables release plenty of natural juices during the slow cooking process that combine with the salsa to create a perfect consistency.

How to tell it’s done

The turkey is ready when it reaches a minimum internal temperature of 165°F (74°C) throughout the thickest part of the tenderloin. The meat should pull apart easily with two forks without any resistance. If the turkey still feels tough or firm, continue cooking for another 30 minutes and re-check the temperature. Always use a digital meat thermometer to confirm the reading for safety.

  • Poultry: 165°F (74°C) in the thickest part

Coming up in Part 3: common questions

  • Can the turkey be cooked on high instead of low?
  • What if the sauce is too watery after cooking?
  • Can frozen turkey tenderloins be used?

Also in Part 3: variations (Spicy Kick, Tex-Mex Bowl), 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)