This recipe comes from Things You Have Always Wanted to Know About Cooking by Margaret Mitchell. The cookbook was published and printed in silver ink by The Aluminum Cooking Utensil Company in 1932. My particular copy was given away as a courtesy by Lit Brothers in Philadelphia.
I type the recipe verbatim. It makes a lovely muffin with an interesting crumb. Graphic Artists may find the illustrations and typefaces a pleasure to look at and utilize.
"Rice Muffins are among the best of their kind and are made thus: Sift together two and one half cups of flour, 5 teaspoons of baking powder, 3 tablespoons sugar, one half teaspoon of salt. Beat one egg and add one half cup of milk and three tablespoon of melted shortening, or oil, and stir into dry ingredients. Into one half cup of milk put one half cup of cold boiled rice, and stir well. Add to mixture, mix well and bake in an oven at 375 degrees Fahrenheit for 20 minutes."