Begin by rinsing the sweet potatoes and shaking off any excess water.
There’s no need to dry them, as the moisture will help them steam during cooking.
Place the sweet potatoes in the slow cooker, using a 6-quart or larger one.
If cooking 1 or 2 potatoes, place them in the center.
For more potatoes, stack them in layers.
There’s no need to poke holes in the potatoes or wrap them in foil.
Set the slow cooker to cook on LOW for 6 to 8 hours or on HIGH for 3 to 4 hours
Check for doneness by piercing with a fork; they should be tender.
Cooking time may vary based on the size of your sweet potatoes and the type of slow cooker used.
Once cooked, carefully remove the sweet potatoes from the slow cooker.
Let the potatoes cool enough to handle, then cut a slit down the middle.
Gently push the ends together to open up the potato and add your desired toppings or scoop out the flesh for use in other recipes.
Let them cool down for a while on chopping board.
Serve the sweet potato with an added butter piece on top.