This is a recipe for raw chocolate sandwich cookies that can be made with just four ingredients and without using eggs, butter, or milk. The appeal of this recipe lies in its ease of preparation: simply mix silken tofu and cocoa powder, and then chill in the refrigerator without using an oven. Mixing the tofu thoroughly until there are no lumps eliminates the tofu's characteristic smell and results in a smooth texture. When placing the cookies on top, lightly press them down to ensure a clean finish without any gaps between the dough and the cookies. You can enjoy the texture of the crispy cookies and the gooey raw chocolate, and the slightly bitter taste of cocoa gives it a sophisticated adult flavor. The simple process of just mixing and chilling makes it recommended even for beginners in baking.