Add the drained pinto beans, frozen corn, frozen pepper and onion mix, and fire-roasted diced tomatoes to the slow cooker.
Pour in the vegetable broth.
Sprinkle the chili powder, cumin, garlic powder, salt, and black pepper over the top.
Stir everything together until the spices are evenly distributed.
Cover and cook on low for 6 to 7 hours.
Stir once more before serving.