Another iteration of a familiar favorite.
For more on the word penuche, visit the entry for penuche icing from Kent, Ohio.
From the box of L.S. from Joplin, Missouri.
1/2 c. butter
1 c. brown sugar
1/4 c. milk
1-3/4 to 2 c. sifted powdered sugar
Melt butter in saucepan. Add brown sugar. Boil 2 minutes over low heat, stirring.
Stir in milk. Bring to boil, stirring constantly.
Cool to lukewarm; gradually add sugar. Beat till thick. If too stiff, add little hot water.