Slow Cooker Sour Cream and Onion Turkey Tenderloin Step-by-step instructions

Before you start

Before starting, ensure your slow cooker insert is clean and dry. Remove the turkey tenderloins from the refrigerator about 15 minutes before cooking so they are not ice-cold when they hit the pot.

Slice the fresh onion into consistent half-moon pieces to ensure they cook evenly. Have your chives chopped and your measuring tools ready on the counter to make the assembly process efficient and quick, allowing you to get the meal started in just a few moments.

Instructions

Layering the ingredients

1. 1Prepare the slow cooker base
   Place the turkey tenderloins into the bottom of the slow cooker insert. Layer the half-moon onion slices evenly over the top of the turkey to ensure they cook down into the sauce.
   Look for The turkey should be arranged in a single layer if possible to ensure even cooking throughout the process.
   Tip If the tenderloins are very large, you can cut them in half to ensure they fit comfortably in the slow cooker.

At the end of this phase, the turkey should be neatly arranged at the bottom of the slow cooker with a layer of onions providing a base. The ingredients are now ready to be seasoned and covered with the condensed soup, creating the foundation for the braising process.

Check that the onions are spread out and not clumped together, as this ensures they soften properly and contribute their sweetness to the final sauce.

Seasoning and braising

2. 2Season and combine
   Sprinkle the onion powder and fresh chives over the onions and turkey. Spoon the condensed chicken soup over the top, spreading it out slightly to cover the surface.
   Look for Ensure the soup is distributed relatively evenly over the turkey to provide enough moisture for the braising process.
   Tip Use a spatula to gently spread the soup if it is too thick to pour directly from the can.

Once the seasoning and soup are added, the slow cooker is ready to be sealed. The ingredients are now in place to begin the slow braise. Ensure the soup is spread evenly over the turkey to provide maximum moisture. The kitchen should begin to smell like savory onions and herbs as the slow cooker starts to heat up, indicating that the braising process has successfully begun and the flavors are starting to meld.

Finalizing the sauce

3. 3Cook and finish
   Cover the slow cooker and cook on low for 4 to 6 hours or on high for 2 to 3 hours. Once the turkey reaches an internal temperature of 165°F (74°C), stir in the sour cream and let it rest for 5 minutes before serving.
   Look for The sauce should look creamy and the turkey should be tender and opaque throughout.
   Safe temperature 165°F (74°C) internal temperature (poultry)
   Tip Do not skip the resting period as it allows the sauce to thicken and the meat to reabsorb juices.

After the cooking time is complete and the turkey has reached the correct temperature, the final phase involves incorporating the sour cream. Stir gently until the sauce is smooth and uniform in color. The texture should be thick and luxurious, and the aroma should be rich and comforting. Let the dish rest for a few minutes to allow the sauce to settle and the meat to reabsorb any juices before serving.

Common mistakes

A common mistake is overcrowding the slow cooker, which can prevent the sauce from circulating properly and lead to uneven cooking. Ensure there is enough space around the turkey for the heat to distribute.

Another error is adding the sour cream too early; always stir it in at the very end of the cooking process to prevent it from curdling or separating under prolonged high heat. Finally, avoid lifting the lid frequently, as this releases essential heat and moisture.

How to tell it’s done

The turkey is perfectly cooked when it reaches an internal temperature of 165°F (74°C) as measured by a meat thermometer inserted into the thickest part of the tenderloin. The meat should be completely opaque and easy to pull apart with a fork.

If you find the meat is still firm, continue cooking for another 20 minutes and check again. The sauce should appear thick, creamy, and flecked with green chives, coating the back of a spoon.

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