Toast flour over medium high heat until it forms a nutty aroma. Stir frequently. Becareful not to burn the flour.
Combine the flour, sugar, powdered milk and butter. It's easier to do this with your hands.
Use a polvoron mold to form. A tablespoon may be used if you don't have a mold. A mold can be had for about $8 and can be found by a quick search on google.
Line up the polvoron and place in the fridge for 15 minutes to firm up. Chilling will make it easier to wrap.
Wrap the polvoron in a 5x7 piece of tissue wrapping paper. Amazingly, I found this tissue wrapping paper next to the paper plates at Safeway.