# What You'll Need:
→ For the Filling
01 - 2 tablespoons unsalted butter
02 - 1 medium yellow onion, diced
03 - 2 medium carrots, diced
04 - 2 celery stalks, diced
05 - 2 cloves garlic, minced
06 - 1/3 cup all-purpose flour
07 - 2 cups low-sodium chicken broth
08 - 1 cup whole milk
09 - 2 cups cooked chicken breast, diced or shredded
10 - 1 cup frozen peas
11 - 1 teaspoon fresh thyme leaves or 1/2 teaspoon dried thyme
12 - 1 teaspoon salt
13 - 1/2 teaspoon freshly ground black pepper
→ For the Biscuit Topping
14 - 2 cups all-purpose flour
15 - 1 tablespoon baking powder
16 - 1/2 teaspoon baking soda
17 - 1 teaspoon salt
18 - 6 tablespoons cold unsalted butter, cubed
19 - 3/4 cup cold buttermilk
20 - 1 large egg, lightly beaten for egg wash
# Directions:
01 - Set oven temperature to 400°F
02 - In a large skillet or Dutch oven, melt butter over medium heat. Add onion, carrots, and celery, sautéing for 6 to 8 minutes until softened. Add minced garlic and cook for 1 minute more
03 - Sprinkle flour over vegetables and cook while stirring constantly for 1 to 2 minutes until flour is absorbed
04 - Gradually whisk in chicken broth and milk, bringing to a simmer while stirring until thickened, approximately 3 to 4 minutes
05 - Stir in cooked chicken, peas, thyme, salt, and pepper. Remove from heat
06 - Pour filling into a 9 by 13 inch baking dish or large pie dish
07 - In a large bowl, whisk together flour, baking powder, baking soda, and salt. Add cold cubed butter and cut in using a pastry blender or fingers until mixture resembles coarse crumbs
08 - Add buttermilk and gently stir until just combined, being careful not to overmix
09 - Drop spoonfuls of biscuit dough evenly over the filling. If desired, brush tops with beaten egg for a glossy finish
10 - Bake for 25 to 30 minutes until biscuits are golden brown and filling is bubbling at the edges
11 - Allow to rest for 5 to 10 minutes before serving