Preheat your oven to 400°F (200°C) and lightly grease a muffin tin.
In a large bowl, mix together the thawed hash browns, cheddar cheese, olive oil, salt, and pepper until well combined.
Spoon the mixture into the prepared muffin tin, pressing down to cover the bottom and sides of each cup.
Bake in the preheated oven for 20-25 minutes, or until the edges are golden brown and crispy.
If desired, crack an egg into each cup and bake for an additional 10 minutes, or until the eggs are cooked to your liking.
Remove from the oven and let cool slightly before serving. Enjoy your hash brown cups warm!