Why is my hash brown casserole soggy?

This can happen if you use frozen hash browns as they will release water as they defrost. It can also happen if the eggs are undercooked.

What's the difference between a frittata and a breakfast casserole?

The main difference between frittatas and breakfast casseroles is that the egg custard for the frittata is started on the stove. The eggs are placed in an oven-safe frying pan and combined with the fillings before being placed in the oven to finish off the cooking. A breakfast casserole is fully cooked in the oven.

How do you thicken breakfast casserole?

If you sufficiently cook the eggs, the casserole will not need thickening as the eggs will do that job.

Breakfast Carbonara Hash Brown Egg Casserole

Ingredients

Preheat your oven to 375°F (190°C). Grease a 9×13-inch baking dish with butter or cooking spray.
In a skillet over medium heat, cook the diced pancetta until crispy and golden brown. Remove with a slotted spoon and set aside.
Spread the thawed hash browns evenly across the prepared baking dish. Sprinkle the cooked pancetta over the top.
In a large bowl, whisk together eggs, heavy cream, Parmesan cheese, garlic powder, black pepper, and a pinch of salt. Add 2 tablespoons of chopped parsley for a pop of freshness.
Pour the egg mixture evenly over the hash browns and pancetta. Sprinkle mozzarella over the top for an extra cheesy layer.
Bake in the preheated oven for 35–40 minutes, or until the casserole is set and the top is golden and slightly bubbly.
Let the casserole rest for 5 minutes before serving. Sprinkle with additional Parmesan, parsley, and a crack of black pepper for a restaurant-worthy finish.