Cheddar Bay Biscuit Egg Breakfast Casserole

Name: Cheddar Bay Biscuit Egg Breakfast Casserole
Prep time: 15 min
Cook time: 35 min
Total time: 50 min
Cuisine: American
Ingredients: 2 cups all-purpose flour; 1 tablespoon baking powder; 1/2 teaspoon salt; 1/4 teaspoon garlic powder; 1/2 cup cold butter, cubed; 1 cup shredded cheddar cheese; 3/4 cup buttermilk; 6 large eggs; 1/2 cup milk (whole or 2%); 1/4 teaspoon black pepper; 1/2 teaspoon onion powder; 1/2 cup shredded cheddar cheese; 4 strips turkey bacon, cooked and crumbled; 1/4 cup chopped green onions (optional)