1. Combine onion powder and milk in a small bowl, and allow to soak for a few minutes.

2. In a mixing bowl, combine flour and salt. Cut in butter. Add egg and onion powder/milk mixture. Knead into a smooth, soft dough, adding additional flour if needed.

3. Divide dough in half. On a lightly floured surface, roll each piece of dough into a large rectangle, at least 1/4-inch thick but not more than 1/2-inch thick.

4. Using a pizza cutter or butter knife, cut dough into 2x2-inch squares, or another size as desired. Place squares on a lightly greased, lightly salted cookie sheet or jelly roll pan. Use a fork to prick each square several times before baking.

5. Bake at 450 degrees for 10-14 minutes, until golden and cooked through (but not hard or dark). Remove to wire rack; cool.