Slow Cooker 5-Ingredient Ranch Pork Tenderloin with Potatoes and Green Beans

For a practical one-pot dinner, place a whole pork tenderloin in the slow cooker with baby potatoes, ranch seasoning and butter. Add green beans near the end so they stay pleasantly tender. The result is a complete supper for four to six people with very little hands-on work.

Why this recipe works

The potatoes cook beside the pork and absorb the buttery, seasoned juices. The green beans go in during the final half-hour, when the pork is nearly finished, so they do not spend hours simmering. A thermometer is the best way to keep this lean cut juicy.

Ingredients

• 1 whole pork tenderloin, about 1½ pounds: Keep it whole for even cooking and easier slicing.
• 1½ pounds baby potatoes: Halve larger potatoes; leave the smallest whole.
• 12 ounces frozen cut green beans: Add them toward the end of cooking.
• 1 packet dry ranch seasoning: Sprinkle over the pork and potatoes.
• ½ stick butter (4 tablespoons): Cut into small pieces so it melts over the food.

Step-by-step method

1. Arrange the pork and potatoes

Lightly grease the slow-cooker insert if it tends to stick. Lay the whole tenderloin in the center and place the potatoes around it. Keep the potatoes in an even layer where possible.

2. Season and add butter

Sprinkle the ranch seasoning over the meat and potatoes. Distribute the butter pieces across the top. Cover the cooker.

3. Cook gently

Cook on LOW for approximately 4 to 6 hours, or on HIGH for approximately 2½ to 3½ hours. Start checking early because tenderloin is lean and slow cookers vary. The potatoes should be tender and the thickest part of the pork should reach at least 145°F (63°C) on a food thermometer.

4. Add the green beans

About 30 minutes before you expect to serve, scatter the frozen green beans around the pork and potatoes. Replace the lid and cook until the beans are hot and tender. If the pork reaches temperature before the vegetables are ready, lift it out, cover it loosely and finish the vegetables separately in the cooker.

5. Rest, slice and serve

Transfer the pork to a board and let it rest for at least 3 minutes before slicing into medallions. Serve with the potatoes and green beans and spoon the buttery juices over each portion. For a fuller meal, add a simple salad or dinner rolls.

Variations & Tips

• Fresh beans: Use fresh green beans and add them for the final 45 to 60 minutes, depending on thickness.
• Even potatoes: Cut large baby potatoes in half and keep pieces similar in size.
• Check the meat early: A thermometer prevents a lean tenderloin from cooking longer than needed.
• Fresh finish: Sprinkle chopped parsley over the portions if you have some; it is optional and makes this a six-ingredient variation.
• More sauce: Spoon the cooking juices over the slices just before serving rather than leaving sliced pork in the cooker.

Storage and reheating

Refrigerate leftovers promptly in a covered container. Warm the sliced pork gently with a little of the cooking liquid so it does not dry out. Reheat potatoes and beans until hot throughout. This meal is best on the day it is cooked.

Frequently asked questions

Can I put the beans in at the start?

You can, but they will become very soft after several hours. Adding them near the end gives a better texture.

Is pork tenderloin the same as pork loin?

No. Tenderloin is smaller and leaner, so a larger pork loin roast needs a different cooking schedule.

How do I know the pork is safe to serve?

Measure its thickest part with a food thermometer. The USDA advises 145°F (63°C) and a rest of at least three minutes for whole cuts of pork. USDA food-safety guidance.