In a skillet, melt the butter over medium heat. Stir in the flour and cook for 1 minute.

Gradually whisk in the chicken broth and milk, cooking until the mixture thickens, about 5 minutes.

Add the shredded chicken, mixed vegetables, garlic powder, onion powder, salt, and pepper. Stir to combine and remove from heat.

In a mixing bowl, combine the flour, baking powder, and salt.

Cut in the cold butter until the mixture resembles coarse crumbs.

Stir in the cheddar cheese and milk until just combined.

Preheat the oven to 400°F (200°C).

Pour the chicken filling into a baking dish.

Drop spoonfuls of the biscuit dough over the filling.

Bake for 25-30 minutes or until the biscuits are golden brown and cooked through.