The present invention relates to a solid product containing polar any small chemical compound at the interface between the crosslinked protein droplets having a diameter in the range of 0.1 to 100 microns, and cross-linked proteins at the interface of the oil droplets. [Selection] Figure Figure 1本発明は、0.1~100ミクロンの範囲の直径を有する油滴、前記油滴の界面における架橋タンパク質、及び架橋タンパク質の界面間にある任意の極性低分子化合物を含む固形製品に関する。【選択図】図1