Melted Butter, Irish Fashion, is simply made by melting the butter in milk, without the addition of any flour.
Wholesome fare: a sanitary cookbook, comprising the laws of food and the practice of cookery and embodying the best British and continental receipts with hints and useful suggestions for the sedentary, the sick, and the convalescent,Edmund S. Delamere, Ellen J. Delamere Crosby Lockwood, 1878, p.105.