For a sweet, mild Hungarian paprika is the classic (and best) choice. Our favorite paprika to use when making this mushroom soup is a Hungarian Különleges paprika; a deep, bright red paprika with a very sweet flavor. (If you prefer your mushroom soup a little spicier, try this amazing Hungarian Sweet & Spicy Paprika!)  When making Hungarian Mushroom soup, it is best to avoid using Spanish paprikas if possible. These are made from a slightly different type of pepper than Hungarian varieties, and in this case, its smoky flavor profile is not the paprika you're looking for.