Prepare Crepe Batter: Mix 2 eggs, 1 tablespoon of sugar, 1 tablespoon of vanilla extract, 3 tablespoons of melted butter, 1/2 cup of water, 3/4 cup of milk, 1 cup of flour, and a pinch of salt together until the consistency is like water. Let it rest for 30 minutes.
Prepare Whipping Cream: Beat 1 cup of whipping cream until it reaches a creamy consistency, then refrigerate.
Cook Crepes: Heat a frying pan and lightly grease it. Pour a scoop of batter and spread it into a circle. Cook until light golden, flip, and cook for a few more seconds. Repeat with the remaining batter.
Assemble the Cake: Line a cake pan with parchment paper. Layer crepes with a spread of whipping cream and blueberries in between. Add optional layers of chocolate spread or other fillings as desired. Finish with a crepe on top.
Chill and Serve: Refrigerate the cake for 30 minutes to an hour to set. Decorate with blueberries and chocolate chips before serving.