Add oil to a large skillet set to medium high heat on the stove top. Add the thick cut onion slices to the pan. Brown on both sides.
Add the onions to the slow cooker. Add the beans, seasonings, and chicken broth.
Cook on HIGH For 6 hours.
When the cooking time is done. Use an immersion blender to blend the soup smooth, or a blender can be used, in batches.
Serve with desired toppings.
Notes
Nutritional values do not include toppings for the soup.
Soaking the beans is not necessary in this recipe. If you prefer to, do so overnight or for 8 hours. Drain off water and continue with this recipe, you won't need to cook as long.
Variations
Black beans can be used instead of pinto beans!
For a spicy refried bean soup, add two chopped jalapenos.
To make this vegetarian, use vegetable broth. Or you can use water but you will need to add more salt and seasonings.
Serving ideas
Add a generous sprinkle of cheese to each bowl. We prefer Monterey Jack cheese or sharp cheddar.
Diced sweet yellow onion or green onion will add texture to the soup.
We love this soup topped with crushed saltine crackers, not traditional, but SO good for soaking up the refried bean soup flavors.
Other toppings we love are sour cream and dash of hot sauce.
Lastly, a great side dish to make the soup into a complete meal is to serve with warmed flour tortillas or cornbread.