Combine all ingredients, from eggs through salt. You can use a mixer or mix by hand, both will work. If dough is crumbly, add the tbsp of water to help it come together.
Liberally spray your work surface. Roll out dough to an even, thin layer.
Using a round cup or cookie cutter, cut out circles. Smear a little jam in the center of each circle and fold into hamantaschen shape. Place on a parchment-lined baking sheet.
Bake for 10-12 minutes. Hamantaschen should not turn golden on top. When they are a little golden on the bottom, they are done.