Preheat oven to 350 degrees F.
In a large bowl, mix all the ingredients together except for the powdered sugar. Roll the dough into 1-inch balls and place on a cookie sheet. Press down with a knife to make slits like a triangle in the cookie. Using the end of the knife, press the center of the cookie downward. Bake for 8 to 10 minutes. Let cool and then dust with powdered sugar.
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