Prep your crockpot. Lightly spray the insert with cooking spray or rub with a thin layer of oil to prevent sticking.
Layer the potatoes and onions. Add the cubed potatoes and sliced onion to the bottom of the crockpot.
Scatter the butter pieces over the top.
Season the steak. In a bowl, toss the steak with salt, pepper, smoked paprika, onion powder, thyme, and garlic (or garlic powder) until evenly coated.
Add steak and liquids. Place the seasoned steak over the potatoes. Pour in the beef broth and Worcestershire sauce. Do not stir.
Cook low and slow. Cover and cook on Low for 6–8 hours or on High for 3.5–4.5 hours, until the potatoes are tender and the steak is cooked through.
Cooking time can vary by crockpot and steak cut.
Finish with the “loaded” toppings. In the last 15 minutes, sprinkle the shredded cheese evenly over the top. Cover to melt. Add the crumbled bacon and green onions right before serving.
Taste and adjust. Give it a gentle stir and taste.
Add a pinch of salt or extra Worcestershire if needed. Serve with a dollop of sour cream and a sprinkle of parsley if you like.