Advances in the immunometabolism field have shown that infiltrated immune cells play a pivotal role in the development and function of thermogenic adipose tissue (TAT), including brown and beige fat. However, scarce research has focused on the role that organized lymphoid structures, like lymph nodes and lymphatics vessels, may exert on TAT. In this review we summarize the evidence suggesting that a significant link exists between the lymphoid tissues and adipose tissue, and we describe the most important in vitro and in vivo findings indicating that organized lymphoid tissues also play an important role in TAT biogenesis and function, raising relevant questions which are still unsolved in this emerging field.