First prepare the cream so that it can cool down. In a saucepan over high heat, bring the milk to a boil, stirring the vanilla pudding, egg yolks, vanilla extract and a little cold milk. When the milk starts to boil, add the pudding mixture and stir constantly. Set aside and add the butter, stir to melt and cover with fresh food paper to prevent crusting until completely cooled. Whip the sweet cream or whipped cream powder and mix it into the cooled pudding. Allow to cool for about 1 hour while preparing the eclairs. For eclairs: Put the water, milk, sugar and salt in a pan on the fire to boil. Add the flour together with the baking powder. Stir with a wooden spoon and reduce to medium heat. Out of the entire dough, a ball should be formed. Set aside and add the eggs, stirring between each addition. Transfer the prepared mixture to a cooking syringe with a circular opening. Form the eclairs on baking paper lined in a pan. Sprinkle the eclairs with powdered sugar before baking. Bake in a preheated oven at 230 degrees for 5 minutes, then reduce the temperature to 180 degrees and bake for another 30 minutes. Do not open the oven while the eclairs are being baked. Allow to cool for 15 minutes. Make two or three holes on each eclair at the bottom and with the help of a cooking syringe, apply to each hole so that the filling can be evenly distributed. Melt the chocolate together with the butter and dip each eclair with the front side in the chocolate glaze.