01 -
Heat your milk until hot but not boiling. Mix egg yolks, sugar, vanilla, and flour in a pan until fluffy. Slowly whisk in the hot milk and cook over medium heat, stirring until it thickens. Chill for at least an hour.
02 -
Heat oven to 400°F. Roll out your puff pastry on a sugared surface to 9x12 inches. Cut into 12 one-inch strips and wrap each around a cone mold, overlapping the edges.
03 -
Place the horns seam-side down on a lined baking sheet. Brush with egg wash and bake for 15-20 minutes until golden brown. Let cool before carefully removing from molds.
04 -
Once cooled, pipe the chilled custard cream into each pastry horn. Dust with powdered sugar and serve right away for the best texture.