The steps to make authentic Colla Corii Asini cake are as follows:

Materials/tools: Colla Corii Asini, glutinous rice powder, rock sugar, red dates, walnuts, water, pot, bowl, blender, mold.

1, first of all, cut the appropriate amount of Colla Corii Asini into small pieces and put them into a bowl for spare.

2, prepare a large bowl, pour the appropriate amount of glutinous rice flour into the bowl. Slowly add the right amount of water, stirring as you pour, until the glutinous rice flour and water are fully mixed into a paste.

3. Pour the battered glutinous rice flour into a steamer and steam over high heat for about 15 minutes, until cooked through. While the glutinous rice flour is cooking, add the right amount of rock sugar to another small pot, add the right amount of water, and cook over low heat to dissolve the rock sugar and make sugar water.

4. Take out the steamed glutinous rice flour, pour it into a blender, add the Colla Corii Asini cut into small pieces, and then add the right amount of sugar water. Use the blender to mix the glutinous rice flour, Colla Corii Asini and sugar water well until it becomes a fine paste.

5. Pour the blended paste into a mold, flatten the surface, and place it in the refrigerator for 2-3 hours until solidified. Take out the solidified Colla Corii Asini and cut it into small pieces with a knife. Take appropriate amount of red dates and walnuts and decorate the gelatin cake.