Combine flour, baking powder, oil, and orange juice or water in a bowl.
Refrigerate dough for 1 hour.
Preheat oven to 350°F (175°C).
Divide dough in two. Leave one half of the dough in the refrigerator. Place the other half of dough on a piece of parchment paper, cover with another piece of parchment, and roll flat into a large rectangle.
Smear half of the date spread to cover the dough.
Roll the dough to create a long roll, jelly-roll style, using the parchment paper to help you.
Transfer to a lined baking pan. Repeat with the remaining half of the dough.
Cut slits in the rolls, cutting halfway through, every ½ inch or so.
Bake for 35 minutes.
Slice through each cut to make cookies and sprinkle with a generous amount of confectioners' sugar. Freezes well. Best if stored in freezer; defrost as needed .