Using meat mallet or heavy rolling pin pound pork, layered between plastic wrap, to 1/4-inch thickness. In shallow dish combine flour, half the paprika, and 1/2 teaspoon each salt and pepper. Coat pork in flour mixture; set aside.
In large skillet cook sprouts in hot butter over medium-high 5 to 8 minutes, until crisp-tender and edges are brown. Remove from skillet. Cover and keep warm.
In same skillet add additional butter, if needed. Cook pork 4 to 5 minutes, turning once, until golden outside and slightly pink in center. Remove from skillet. Cover; keep warm.
For sauce, combine sour cream, milk, and brown sugar. Whisk into skillet. Heat through (do not boil). Serve sauce, sprinkled with remaining paprika, over pork and sprouts. Makes 4 servings.