From the Company's Coming: Appetizers cookbook.
Boil 1 cup water and 1/2 cup butter. Add 1 cup flour and a dash of salt. Stir vigorously until mix leaves sides of pan and forms a ball. Remove from heat. Add 4 eggs, one at a time, beating well after each. Drop small spoonfuls on ungreased cookie sheet. Bake at 400 for 15 minutes until puffed, brown and dry. Transfer to a rack and cool.
Nothing fancy, but they taste like bite size Yorkshire puddings.