Hatch green chiles refer to various green chile peppers grown in the Hatch Valley, an area around the village of Hatch in the southern part of New Mexico, USA.
These chiles are prized for their unique flavor, which is somewhat milder than many other chile varieties (typically ranges from 500-3,000 SHUs on the Scoville scale, though some cultivars can reach closer to 10,000 SHUs) but with a distinct and rich taste.
They're more about flavor than intense heat. These chiles are versatile and can be used in a range of dishes. They're often roasted to enhance their flavor and can be used in soups, stews, sauces, salsas, or even in hamburgers and pizzas. The importance of Hatch green chiles to New Mexico's culinary scene cannot be overstated.