This is a recipe for a café latte mousse that can be made in a cup using just three ingredients. The process is simple: heat the café latte, mix in powdered gelatin and heavy cream, pour back into the cup, and chill until set. Warming the cup slightly makes it easier to remove from the mold. Decorate with cocoa powder, whipped cream, and chocolate syrup to create a visually appealing homemade café dessert. The mousse is not too sweet and has a light texture, making it perfect for a quick snack or to serve to guests.