Cook the pastry cream ingredients, stirring until thick. Add butter and vanilla. Cover and chill for 3–4 hours. Beat in the cream until smooth.
Boil water, butter, sugar and salt. Add flour and stir until the dough forms. Cook for 1–2 minutes, then cool.
Beat in the eggs one at a time until smooth. Pipe onto a lined tray.
Bake at 170°C for 30 minutes. Turn off the oven and leave inside for 10 minutes with the door closed.
Cool, slice, fill with cream and top with melted chocolate. Decorate with white chocolate. Enjoy!
