Prepare Chocolate Jelly: In a saucepan, combine cocoa powder, sugar, unflavoured gelatin, and hot water. Stir until the gelatin and cocoa are completely dissolved.
Set the Jelly: Pour the chocolate mixture into a shallow container and refrigerate for 3–4 hours or until completely firm.
Cut into Cubes: Once set, cut the chocolate gelatin into small, bite-sized cubes.
Prepare the Creamy Mixture: In a large bowl, combine sweetened condensed milk, fresh cream, and milk. Mix until smooth and creamy.
Dissolve Gelatin: Dissolve additional unflavoured gelatin in warm water and allow it to cool slightly.
Combine Ingredients: Stir the dissolved gelatin into the creamy milk mixture. Gently fold in the chocolate jelly cubes.
Refrigerate: Pour the mixture into a glass dish or mould and refrigerate for 4–6 hours until completely set.
Serve: Cut into squares and serve chilled. Enjoy this rich and creamy chocolate dessert!