In a medium bowl combine the flour, baking powder, salt and set aside. In a large bowl combine butter and sugar, beating until fluffy. Add egg, brandy, vanilla and beat well after each addition. Add flour mixture / cup at a time blending will after each addition. Roll 1 teaspoon of dough on a lightly floured surface into a 6 inch rope, fold in half and twist 2 or 3 times, pinch ends together. Place 1 inch apart on 3 greased cookie sheets. Brush with egg/milk mixture. Sprinkle with sesame seeds. Bake 10-13 minutes in a preheated 375oF oven until golden. Cool on rack. Store in an air tight container at room temperature. Makes 4/ dozen cookies.