I love white onion soup, these are the closest recipes to the soup my mother served, though her´s did not have cream, just milk and stock, I think in equal quantities and I don´t think Mum ever used mace. I think when I fancy this soup again, I will try different herbs and a little olive oil rather than all that butter.

Recipe 1

1/4 cup unsalted butter
3 generous cups of finely chopped white onions
2 sticks of celery, washed and finely chopped
4 cups of vegetable stock (or chicken)
A blade of mace and bay leaf (in a muslin bag)
3/4 cup wholefat or semi skimmed milk
1/4 cup plain flour
2/3 cup of single cream
Sea salt and white pepper to taste
Herby croutons, if you like them

Sweat the onions and celery for about 5 minutes in melted butter (best not to brown for this soup). Or try half butter and half olive oil
Add the stock, mace and bay leaf, stir and gently bring up to boiling point, cover, reduce the heat and simmer gently until the vegetables are tender (I like sage with onions, but don´t know whether it would work with this soup)
Remove the muslin bag, leave the soup to cool, then blitz to a puree
At this point, add seasoning to taste
Blend the flour with the milk and slowly whisk into the soup
Return the pan to a gentle heat and bring up to a boil, stirring constantly
Reduce the heat and simmer gently for 5 minutes
Taste and adjust seasoning, if necessary
Stir in the cream and reheat gently before serving, do not allow the soup to boil
Serve with herby croutons, or if you like cheese on toast, mini cheesy toasts grilled, float on the top of the soup

Recipe 2

2 tbsp unsalted butter
1 lb white onions, thinly sliced
2 cloves
2 rounded tbsp plain flour
1 pinch freshly grated nutmeg
A bay leaf
1 litre chicken or vegetable stock
300 ml milk
Salt and white pepper
150 ml single cream
3 tbsp grated cheshire cheese

Melt the butter in a saucepan, add the onions and cloves, sweat until they begin to soften, but do not allow them to brown
Sprinkle over the flour and mix well, cook - while stirring - for about 1 minute then add the nutmeg, the bay leaf and stock
Continue stirring while bringing it up the a boil
Simmer until the onions are softened, remove from the heat then gradually stir in milk
Continue stirring while the soup comes up to the boil, remove from the heat and take out the cloves and bay leaf
Serve as is, or liquidise if you like a smooth soup, add the cream and gently reheat (or do the cheffy thing and drizzle the cream onto the soup after you have served it into bowls)
Serve with grated cheese or cheesy toasts or croutons