In a pot, bring water (about 2-3 cups) to boil and add coffee and 3 tablespoons of sugar to melt.
In a bowl with cold water (the rest of the litre), add gelatin powder and let it sit for 1 minute until it blooms and then add the coffee mixture slowly and mix. Put to heat if needed until gelatin powder dissolves.
Transfer coffe gelatin mixture in a container or a baking dish. Let it cool and refrigerate for about 1-2 hours or until completely set.
Mix cream and condensed milk in a separate bowl and chill. If you have extra oreo cookies, you can crush some and add it to the cream mixture (optional.
Cut gelatin into 1-inch cubes and add to the cream and milk mixture or divide in cups/dessert bowls and add cream mixture individually. If desired top with crushed oreos and shaved chocolate. Serve cold.
