Duchess potatoes

Impress dinner guests with a serving of Duchess potatoes. Made with eggs, butter and Grana Padano and piped into swirls, they make an indulgent side dish

  • Prep:25 mins
    Cook:35 mins
  • Easy

Nutrition per serving

  • kcal 161
  • fat 9g
  • saturates 5g
  • carbs 15g
  • sugars 0g
  • fibre 2g
  • protein 5g
  • salt 0.3g

Ingredients

  • 500g floury potatoes, chopped
  • 1 large egg, separated
  • 30g soft butter
  • 30g Grana Padano, finely grated
  • grating of nutmeg
  • vegetable oil, for the tray

Method

  1. Cook the potatoes in a pan of boiling salted water for 15 mins until really tender when pressed into the side of the pan. Drain well and leave to steam-dry in the pan for 2 mins. Mash the potatoes until very smooth – use a ricer if you have one, or use a masher, then press the potatoes through a metal sieve to ensure they're completely lump-free.

  2. Mix the egg yolk, butter and cheese in a large bowl, then add the mash, nutmeg and some seasoning. Mix well with a spatula until the butter has melted and is well incorporated. It will come away from the sides of the bowl, similar to choux pastry.

  3. Heat the oven to 220C/200C fan/gas 7. Spoon the mash into a piping bag with a wide star nozzle. Line a baking sheet with baking parchment and brush over a little vegetable oil. Pipe 20 walnut-sized peaked mounds onto the prepared tray, as if you were icing a cupcake. Beat the egg white with a pinch of salt and brush the potato mounds gently, to keep the fluting.

  4. Bake the potatoes for 15-20 mins until golden-brown and crisp.

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