Step 1: Preheat oven to 375°F (190°C). Lightly grease a 9×13 inch baking dish.
Step 2: In a large skillet, cook the breakfast sausage over medium-high heat, breaking it up with a spoon, until browned and cooked through. Drain off any excess grease thoroughly.
Step 3: In a medium bowl, combine the softened cream cheese, 1/2 cup shredded cheddar cheese, milk, garlic powder, and onion powder. Mix until well combined and smooth. Season with salt and pepper to taste.
Step 4: Add the cooked and drained sausage to the cream cheese mixture and stir until fully incorporated.
Step 5: Unroll the crescent roll dough and arrange it in the prepared baking dish, pressing the seams together to form a single layer crust on the bottom. You may need to slightly stretch it to cover the bottom.
Step 6: Evenly spread the sausage-cream cheese mixture over the crescent roll crust.
Step 7: Sprinkle the remaining 1/2 cup shredded cheddar cheese over the sausage mixture.
Step 8: Bake for 20-25 minutes, or until the crescent rolls are golden brown and the cheese is bubbly and melted.
Step 9: Remove from oven and let stand for 5 minutes before slicing and serving. Garnish with fresh parsley if desired.