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- 2 Tbsp. olive oil, plus extra to grease
- 3 large onions, finely sliced
- 1½ tbsp wholegrain mustard
- 2 tsp. dried thyme
- 1 1/2 kg (3¼lb) floury potatoes
- 600 ml tub double cream
- 400 ml (14fl oz) whole milk
- 2 g large garlic cloves, crushed
- Handful fresh white breadcrumbs
- Step 1
Heat the oil in a large pan and gently cook the onions, covered, for 15min until completely soft - stir occasionally to make sure they aren't catching (add a few drops of water if they are). Stir in the mustard, thyme and some seasoning; transfer to a bowl.
- Step 2
Preheat oven to 200°C (180°C fan) mark 6 and thoroughly grease a 3 litre (5¼ pint) ovenproof serving dish (not too deep). Peel the potatoes and slice into 3mm (⅛in) rounds -
a mandolin is helpful for this. Put the potato slices into the empty large pan with the cream, milk, garlic and plenty of seasoning. Bring to the boil.
- Step 3
Pour potato mix into the prepared dish and level the slices as much as possible. Top with onion mix and cover with foil.
- Step 4
Cook for 45min, then take off foil, scatter over breadcrumbs and return to the oven, uncovered, for about 25min or until golden and the potatoes are completely tender (test by pushing a knife into the mixture - it should go through easily). Serve immediately.
Have a look at some more triple-tested dauphinoise recipes:
Dauphinoise potatoes
Individual Celeriac dauphinoise
Mustardy celeriac dauphinoise
Celeriac dauphinoise
Per Serving:
- Calories: 612
- Fibre: 5 g
- Total carbs: 40 g
- Sugars: 8 g
- Total fat: 46 g
- Saturated fat: 27 g
- Protein: 8 g

A crack team of highly skilled food content producers, the GH Kitchen Team are Good Housekeeping’s resident recipe developers and all-round food obsessives. GH Kitchen Director Sarah Akhurst is our resident hosting pro and loves nothing more than putting on a foodie feast for friends. Senior Cookery Writer Alice Shields is a former pastry chef and baking fanatic who loves making bread and would have peanut butter with everything if she could. Lover of all things savoury, Senior Cookery Writer Grace Evans can be found eating nocellara olives at every opportunity, and will take the cheeseboard over dessert any time. With a wealth of professional kitchen experience between them, they’re dedicated to ensuring every Good Housekeeping recipe is the best it can be, so you can trust they’ll work every single time.
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