In a bowl whisk together the dry ingredients. I used a food processor to make this dough, but both methods work fine. With a pastry blender cut in the chilled butter till it's the size of peas. Add the cold water a tablespoon at a time till the dough comes together. Form the dough into a ball and wrap in plastic wrap, pressing down into a disk. Refrigerate for 1 hour. Roll out into a rectangle and cut approx 3" by 5 " pieces. Place jam on the center of a cut piece of dough, top with another piece and seal the edges with the tines of a fork dipped in flour. Bake on a parchment lined pan at 375º for 25 to 30 minutes. I baked mine for 27 minutes. Let cool. You can leave them plain or ice them with your favorite frosting and top with sprinkles.