What adds a rich flavor to the Danish Blue Cheese Butter?

Shallots are known for their mild, sweet flavor and subtle onion notes, which can enhance the richness of Danish Blue Cheese Butter. When incorporated into the butter, shallots provide a depth of flavor that complements the characteristic tanginess of blue cheese. Their delicate taste helps to balance the intensity of the cheese without overpowering it, making them an excellent choice for creating a well-rounded, flavorful compound butter.

Other ingredients listed may also contribute flavor, but their profiles differ significantly. Garlic, for instance, lends a stronger and more pungent note, which might overshadow the blue cheese if used in excess. Truffles add an earthy and luxurious quality, but their rarity and strong aroma may not seamlessly integrate into the context of Danish Blue Cheese Butter. Lemon juice offers acidity and brightness, which can cut through richness but might not contribute a "rich" flavor in the same way shallots do. Thus, shallots are the most fitting choice for enhancing the overall flavor profile of Danish Blue Cheese Butter.