Perfect Butter-Baked Petite Potatoes

If you add just one recipe to your potato repertoire, make it this foolproof one-size-fits-all. No matter the shape or variety, all mini-spuds seem to take a shine to it. In fact, several varieties cooked together are most appealing. The juices concentrate and the flesh becomes tender within, chewy without, as the skins soften and sweeten. Butter quality is of paramount importance: Invest in the richest and most flavorful, whether from a domestic dairy or imported from France or Denmark.