Sprinkle the gelatin over a little of the water from the recipe. Warm the remaining water in the microwave, then dissolve the cocoa powder, sweetener, and instant coffee in it. Stir well and set aside.

Combine the evaporated milk and regular milk, then warm them in the microwave. Heat the gelatin for a few seconds until it becomes liquid, then add it to the milk mixture and mix well. At this point, add the dissolved coffee mixture and stir until fully combined.

Line a mold with plastic wrap, pour in the mixture, and let it cool. Refrigerate until set. Unmold and use a vegetable peeler to make chocolate shavings for decorating the top.