Dinner · Part 2 of 3: Instructions
Easy Slow Cooker Teriyaki Pork Tenderloin Step-by-step instructions

- Prep
- Cook
- Total
- Serves
- 4
Before you start
Before beginning, ensure the slow cooker basin is clean and dry. Prepare the pork by removing any thick silver skin or excess fat from the surface. Slice the bell peppers into uniform strips to ensure they cook at the same rate.
Have all ingredients measured and ready to add to the cooker for a seamless assembly process. Confirm that the slow cooker is plugged into a reliable power source and that the lid fits securely to trap the necessary heat and moisture during the cooking cycle.
Ingredients at a glance (4)
- 2 lbs pork tenderloin
- 2 cups sliced bell peppers
- 1/2 cup pineapple juice
- 1 cup teriyaki sauce
Instructions
Initial Assembly
- Prepare the slow cookerPlace the pork tenderloins into the bottom of the slow cooker basin. Ensure they are laid out in a single layer to promote even cooking throughout the process.Look for The pork should be arranged evenly across the bottom of the slow cooker.Tip Trim any excess silver skin from the tenderloins before placing them in the cooker to ensure a more tender final texture.
The pork is arranged neatly in the slow cooker, ready to be seasoned. Ensure there is enough space around the meat for the sauce to circulate effectively.
The bell peppers should be distributed evenly over the top of the pork to ensure they are well-integrated into the cooking environment once the liquids are added.
Adding Liquids
- Add vegetables and liquidsScatter the sliced bell peppers over the pork. Pour the pineapple juice and the teriyaki sauce over the top, ensuring the liquid covers the meat and vegetables partially.Look for The liquid should pool around the pork and peppers, creating a flavorful braising environment.Tip Spread the peppers evenly so they cook down into the sauce, infusing the pork with their sweetness.
The pineapple juice and teriyaki sauce are poured over the pork and peppers. The liquid levels should be sufficient to surround the meat without completely submerging it. The mixture should look well-distributed, with the sauce beginning to pool at the base of the slow cooker, ready to start the infusion process.
Cooking and Resting
- Slow cook and serveCover and cook on low for 4 hours. Once finished, ensure the internal temperature of the pork reaches 145°F (63°C). Remove the pork and let it rest for at least 3 minutes before slicing and serving.Look for The pork should be tender and easily sliced, and the sauce should have reduced slightly into a glossy coating.Safe temperature 145°F (63°C) internal temperature (steaks, chops and roasts)Tip Use a digital meat thermometer inserted into the thickest part of the tenderloin to accurately confirm the temperature.
The pork has reached its target internal temperature, and the sauce has reduced to a rich, glossy consistency. The meat should look moist and tender, and the bell peppers should be soft and translucent. Before slicing, the pork must rest on a clean board, which allows the juices to settle for the best texture.
Common mistakes
A common mistake is overcooking the pork, which can lead to a dry texture despite the liquid. Since tenderloin is very lean, it is crucial to monitor the temperature closely and avoid leaving it in the slow cooker for longer than necessary.
Another error is failing to trim the silver skin, which remains tough and chewy even after slow cooking. Finally, do not lift the lid repeatedly during the cooking process, as this releases heat and moisture, significantly increasing the required cooking time.
How to tell it’s done
The pork tenderloin is done when it reaches a safe internal temperature of 145°F (63°C) when measured with a digital thermometer. The meat should be firm to the touch but still tender, and it should slice easily without falling apart.
The sauce should appear glossy and slightly thickened, coating the back of a spoon. Always allow the cooked pork to rest for at least 3 minutes on a cutting board before slicing to allow the juices to redistribute throughout the meat.
- Steaks, chops and roasts: 145°F (63°C) in the thickest part, then a 3-minute rest
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)