Potato Soup(Modern) - cooking recipe

Ingredients

3 small potatoes
1 qt. milk
2 slices onion
cayenne pepper
1 tsp. chopped parsley
3 Tbsp. butter
1 Tbsp. flour
1 1/2 tsp. salt
1/4 tsp. celery salt
celery stalks

Preparation

Cook potatoes in boiling water with salt.
When soft, run through strainer.
Boil milk with onions; remove onions and add milk slowly to potatoes, mixing well with whisk. Melt half the butter.
Add dry ingredients.
Stir until well mixed, then add to soup.
Boil 1 minute; add remaining butter and sprinkle with parsley.
Thin with hot milk, if desired.