Preheat your oven to 350°F (175°C).
Slice the sourdough loaf in a grid pattern without cutting all the way through.
In a bowl, combine melted butter, ranch dressing, garlic powder, and onion powder.
Drizzle the mixture generously over the sliced bread, making sure it seeps into all the cuts.
Stuff the bread with bacon and shredded cheddar, making sure to distribute evenly.
Wrap the loaf in aluminum foil and place it on a baking sheet.
Bake for 15-20 minutes, then uncover and bake for an additional 10-15 minutes until the cheese is bubbly.
Remove from the oven and sprinkle with fresh parsley before serving warm.
