Sour Wiener Gravy is a gingersnap gravy made with sliced all beef wieners, chopped onion, vinegar, water, salt & pepper, and once thickened, serve over mashed potatoes. The brands of store bought gingersnaps I have used to make this dish is...Rippin Good (or) Stauffer's. The Rippin Good Ginger Snaps can be found at Festival Foods, it comes in a 16-oz. box, and the Stauffer's Ginger Snaps can be found at Walgreens Drug Store, it comes in a 14 oz. bag.