Add the butter and olive oil to a large pot over medium-high heat.
Once the butter is melted, add the carrots, celery, and onion. Cook, stirring occasionally, for about 6 minutes, until the veggies are tender.
Add the garlic and flour. Cook, stirring often, for two minutes.
Slowly stir in the chicken broth.
Add the potatoes, parsley, salt, thyme, garlic powder, pepper, and bay leaves. Stir well.
Bring the liquid to a simmer. Cook, stirring occasionally, for about 15 minutes, until the potatoes are tender.
As the soup cooks, bake the biscuits according to their package directions.
Remove the bay leaves. Add the chicken, half & half, and peas. Stir well. Cook just until the chicken and peas are warmed through, about 3 minutes.
Serve the soup with warm biscuits.