Let's cook.
Preheat oven to 375°F (190°C).
In a large oven-safe skillet or Dutch oven, melt 2 tablespoons of butter over medium heat.
Add chopped onion and sliced carrots, cooking for 5-7 minutes until softened.
Stir in the all-purpose flour and cook for 1 minute, stirring constantly.
Gradually whisk in the chicken broth and milk until the mixture thickens, about 3-5 minutes. Bring to a gentle simmer.
Stir in the cooked chicken, frozen peas, salt, and black pepper. Cook for 2-3 minutes until heated through.
Remove the skillet from heat. Arrange the refrigerated biscuits on top of the chicken mixture.
Bake for 18-22 minutes, or until the biscuits are golden brown and cooked through.
Let stand for 5 minutes before serving.
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