Coat the cubed potatoes with flour and place in the slow cooker.
Add diced onion, bacon, and sprinkle pepper over the potatoes.
Pour chicken or vegetable stock over the potatoes and cook on high for 3 and 1/2 hours.
Use a potato masher to slightly mash the cooked potatoes and add half and half. Cook an additional 30 minutes.
Scoop soup into bowls and add toppings of your choice.
Notes
To make without flour: Omit the flour and cook as instructed for 3 and 1/2 hours. Slightly mash the potatoes. Add cornstarch to cold water and add it to the potato mixture to thicken. Cook an additional 3o minutes.
*Nutritional information is a calculated guesstimate. Please note that this can change with different brands and modifications you may make to the recipe. For the most accurate information, use a nutritional calculator with the exact brands and measurements you're using with each recipe.