The flat is the thinner end of the brisket, and while it will also have a nice fat cap on the top, the meat itself is much less marbled and denser protein. It will provide slices that hold together ...
You can easily make this smoked corned beef recipe from a store-bought, pre-brined brisket. However, if you're feeling adventurous, you should pick up a flat cut brisket at the store, looking for one ...