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Dinner · Part 2 of 3: Instructions

Slow Cooker Turkey and Creamy Scalloped Potatoes Step-by-step instructions

A slow cooker filled with turkey tenderloins, sliced potatoes, and onions in a creamy sauce.
Prep
Cook
Total
Serves
4
Includes 5 min resting

Before you start

Before beginning, ensure the turkey tenderloins are clean and any excess moisture is patted dry. Slice the potatoes into consistent, thin rounds using a mandoline or a sharp chef's knife to ensure they cook evenly.

Thinly slice the yellow onions to ensure they soften completely and melt into the sauce during the long cooking process. Have all measuring tools ready and ensure the slow cooker is clean and positioned on a stable, heat-resistant surface away from any edges.

Ingredients at a glance (5)
  • 1 1/2 lb turkey tenderloins
  • 3 cups potatoes, sliced into rounds
  • 1 cup yellow onion, thinly sliced
  • 1 tbsp poultry seasoning
  • 1 1/2 cups creamy sauce

Instructions

Preparation and Layering

  1. Layering the ingredients
    Place the raw turkey tenderloins into the bottom of the slow cooker. Arrange the potato rounds and sliced onions evenly over the top of the turkey. Sprinkle the poultry seasoning over the potatoes and onions to ensure even coverage.
    Look for Turkey is at the bottom with potatoes and onions layered on top.
    Tip Slice potatoes uniformly to ensure they cook through at the same rate.

The slow cooker should look organized, with the turkey tenderloins forming an even base layer. The potatoes and onions are distributed uniformly on top, and the seasoning is well-distributed. Everything should feel ready for the addition of the liquid components.

Slow Cooking Process

  1. Adding the sauce and cooking
    Pour the creamy sauce over the layered ingredients, ensuring it coats the potatoes and onions. Cover the slow cooker with the lid and set to cook on low for 4 hours until the turkey is tender and cooked through.
    Look for Sauce covers the ingredients completely.
    Tip Do not lift the lid during cooking to maintain consistent temperature.

During the cooking phase, the slow cooker will emit a savory, herbaceous aroma as the turkey and onions soften. The sauce will begin to bubble gently around the edges. By the end of this phase, the turkey should look opaque and the potatoes should be soft.

Final Resting and Serving

  1. Final check and serving
    Check that the turkey reaches an internal temperature of 165°F (74°C). Allow the turkey to rest for 5 minutes before slicing and serving alongside the tender potatoes and creamy sauce.
    Look for Turkey is opaque and tender.
    Safe temperature 165°F (74°C) internal temperature (poultry)
    Tip Use a meat thermometer to ensure safety.

At the end of the cooking time, the turkey should be extremely tender and easily sliced. The sauce should be glossy and thick, coating the potato slices completely. Allow the meat to rest briefly to ensure the juices redistribute before serving, resulting in perfectly succulent slices.

Common mistakes

A common mistake is slicing the potatoes too thickly, which results in uneven cooking where the turkey is done but the potatoes remain hard.

Another frequent issue is lifting the slow cooker lid repeatedly, which releases heat and steam, significantly extending the cooking time and potentially affecting the texture of the sauce.

Avoid using frozen turkey, as it can lead to uneven cooking and food safety issues; always ensure the meat is fully thawed in the refrigerator before adding it to the slow cooker.

How to tell it’s done

The turkey is properly cooked when it reaches an internal temperature of 165°F (74°C) as measured with a digital meat thermometer inserted into the thickest part of the tenderloin. The potatoes should be fork-tender, easily pierced without resistance.

The sauce should have thickened into a rich, creamy consistency that coats the back of a spoon. If the turkey has not reached the target temperature, continue cooking in 15-minute increments until fully cooked and safe for consumption.

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

Coming up in Part 3: common questions

  • Can other types of potatoes be used for this recipe?
  • Why is it important to layer the turkey at the bottom?
  • Is it possible to use chicken instead of turkey?

Also in Part 3: variations (Herb-Roasted Garlic Version, Cheesy Potato Variation), 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)