Twenty Quick Soups by Sarah Tyson Rorer

Take four cold, boiled beets and grate them. Dissolve a teaspoonful of beef extract in one pint of boiling water. Add it to the beets, and when they reach the boiling point add one pint of hot milk; stir in a tablespoonful of butter, palatable seasoning of salt, and when it reaches the boiling point, add tablespoonful of arrow-root dissolved in two tablespoonfuls of cold water. Bring to boiling point again, and serve.