First, add the potatoes, jalapenos, onion, and chicken broth to a slow cooker or crock pot. Then, add garlic powder, cayenne pepper, paprika, salt, and pepper, and stir to combine.
Cover and cook on LOW for 7 hours, or until the potatoes are fork-tender.
Next, roughly mash the potatoes right in the slow cooker, breaking them up into bite-size chunks. Then, add the shredded cheese, butter, and heavy cream to the slow cooker.
In a small bowl, whisk together the milk and cornstarch to make a slurry. The mixture will solidify if it stands still, so whisk thoroughly until the cornstarch is fully dissolved, then keep whisking as you pour the slurry into the slow cooker.
Stir until everything in the slow cooker is combined well, then cover and continue cooking on LOW for 1 hour, or until the soup is thick and creamy.
In the meantime, prepare the toppings. Once the soup is ready, serve hot, topped with crumbled bacon, shredded cheddar, scallions, and sour cream.
Notes
Substitutions: The jalapenos give this soup a very slight amount of heat. It's barely noticeable, but lends a lot of flavor to the soup with a little bit of spice. If you don't like anything remotely spicy, we recommend swapping this for green bell pepper. (1 small bell pepper = about 2 medium jalapenos).Serving suggestions: Just like a loaded baked potato, you can customize the toppings for this soup however you like! We recommend bacon, cheddar, scallions, and either sour cream or plain Greek yogurt.If you'd like, you can also save the potato skins after peeling and fry them up for a crispy potato skin topping! Soak them in a bowl of water for a few hours, then fry them in the bacon grease until they're crispy after preparing your other toppings.Storing & reheating leftovers: Store leftover potato soup in an air-tight container in the fridge for up to 4 days. Before reheating, stir the soup in its container since it may separate slightly. You can reheat the soup a few different ways, depending on how much you want to reheat at once - check out our blog post above for detailed instructions.