Preheat the oven to 400°F and lightly grease the ramekins. Place them on a baking sheet for easy handling.
In a bowl, mix thawed hash browns with melted butter, garlic powder, onion powder, salt, and black pepper. Divide evenly into ramekins and press down firmly.
Bake the hash brown base for 15–18 minutes until edges are golden and crispy.
Lower oven temperature to 375°F. Place bacon pieces on the potato base, then sprinkle cheddar and mozzarella over each ramekin.
Carefully crack one egg into each ramekin. If using heavy cream, drizzle a little over the top. Season lightly with salt and black pepper.
Bake for 12–15 minutes until the whites are set and yolks still jiggle slightly.
Remove from oven and let rest 1–2 minutes. Garnish with fresh chives or parsley and serve.