Step 1

Place the potatoes, butter, garlic, salt, pepper, and water in the slow cooker.

Step 2

Cover with lid and cook on high for 4 hours, or cook on low for 6 to 7 hours.

Step 3

When finished cooking, remove the lid and add in the sour cream.

Step 4

Mash the potatoes with a potato masher to desired consistency.

Step 5

Taste for salt and pepper.

Step 6

Serve.