Sift the flour, baking powder, salt and soda together. Reserve.
Cream the butter, and gradually add in the sugar, beating well.
Add in the eggs one at a time, scraping well after each addition.
Using an electric mixture, gradually add in 2 cups of the dry ingredients mixing well after each addition. Stir in remaining ingredients by hand.
Transfer the dough onto a floured work surface, and knead until the dough is smooth.
Divide the dough into 8 equal parts. Roll each part into a log 1/2 inch thick and about 18 inches long. Cut each log into 5 pieces. Cut slits half way through each piece along one side at 1/2 inch intervals. Seal the ends together to form a circle and place on a parchment lined baking sheet.
Bake in a preheated 400 degree oven for about 10 minutes, but watch the time and don't let the cookies get very browned. Once they are done, lightly brush with the glaze. Allow to cool.