Mix the chopped white chocolate, hot cream, and softened gelatin until the chocolate and gelatin are completely dissolved.
Beat the egg yolks and sugar until creamy.
Gently fold the white chocolate cream into the egg mixture until it becomes cold.
Pour ⅓ of the white chocolate pudding into a small sheet pan and let it solidify. Then use a bottle cap (or something similar) to cut out small circles. Meanwhile, prepare the dark chocolate pudding in the same way you prepared the white chocolate pudding.
Spread out the white chocolate pudding circles in a round metal bowl or silicone mold.
Pour ⅔ of the dark chocolate pudding into the bowl.
Push a smaller mold into the center of the pudding.
Wait until the dark chocolate pudding has solidified and then carefully remove the small bowl.
Pour the rest of the white chocolate pudding in the hollow space and let it cool. If the pudding has solidified, just pop it in the microwave until it liquefies.
Pour the rest of the dark chocolate pudding into the bowl.
Refrigerate the cake for at least 12 hours and carefully remove the mold before serving.