Chicken Pot Pie

Name: Chicken Pot Pie
Prep time: 30 min
Total time: 30 min
Cuisine: American, Southern
Ingredients: 3 c. all-purpose flour, plus more for surface; 1 c. butter, cut into 1/2" pieces; 1 tsp. baking powder; 1 tsp. Kosher salt; 1/2 c. ice water (or more, if needed); 4 boneless skinless chicken breasts (or 3 cups shredded cooked chicken); 1/2 c. butter, plus more for baking dish; kosher salt; Freshly ground black pepper; 2 large carrots, peeled and diced; 1 medium onion, chopped; 3 cloves garlic, minced; 3/4 c. all-purpose flour; 3 c. low-sodium chicken broth; 1/4 c. heavy cream; 1 c. frozen peas; 2 tbsp. freshly chopped parsley; 2 tsp. freshly chopped thyme leaves; Egg wash; Flaky sea salt