Wrap each potato in a piece of aluminum foil with a slice of onion, butter, salt and pepper. Tightly roll the each potato up in the aluminum foil, tucking the edges as you go.
Set aside and repeat with the remaining potatoes.
Layer the potatoes in the bottom of your crock pot. You can stack them if need be.
Pour a ½ cup water into the bottom of the crock pot.
Cook potatoes on high for 5 to 6 hours or until fork tender.
Rotate the potatoes half way through the cooking if you have stacked them. For a single layer turn the potatoes at the half way mark.
Turn the crock pot on to the warm setting to keep the potatoes hot while serving.
Serve hot with your favorite baked potato toppings.
Video
Recipe Expert Tips
baking potatoes: Russet potatoes have the best flavor and fluffy texture.
best slow cooker size for potatoes: an oval crock pot works best when baking potatoes in a crock pot. There is more room to arrange the potatoes in the larger wider slow cooker.
adding flavor to crock pot baked potatoes: A thin slice of onion adds a delicious flavor to baked potatoes.
wrapping with aluminum: tightly wrap each potato with aluminum foil to keep the butter from leaking.
Adding water to the crock pot: When making baked potatoes wrapped in aluminum foil with butter, seasonings and an onion adding a small amount of water to the bottom will prevent any butter from burning that might leak from the aluminum.