3 old time biscuits Recipes

self-rising flour, cold unsalted butter , cut into 1/2-inch pieces, whole milk, all-purpose flour , for dusting, onion, finely chopped, carrots, finely chopped, celery ribs, finely chopped, salt, black pepper, unsalted butter, all-purpose flour, reduced-sodium chicken broth (14 fl oz), chopped fresh thyme, half-and-half, chopped cooked chicken (from a 3- to 3 1/2-lb rotisserie chicken), fresh lemon juice

bacon drippings, all-purpose flour, salt , or to taste, ground black pepper , or to taste, milk, divided