Abstract: An ice making assembly includes an ice mold defining a mold cavity and a refrigeration loop having an evaporator assembly in thermal communication with the ice mold. A compressor is operably coupled to the refrigeration loop for circulating a flow of refrigerant through the refrigerant loop to cool the evaporator assembly and the ice mold. The evaporator assembly includes a primary evaporator tube and a thermal enhancement structure, such as internal tubes and/or copper foam, placed therein to increase the refrigerant side surface area. The primary evaporator tube is deformed into a non-circular cross sectional shape and soldered or brazed onto a top wall of the ice mold.