In a large bowl, combine the almonds and cinnamon. Beat the egg whites until soft peaks form. Gradually add powdered sugar while beating until egg whites become thick and glossy. Gently fold egg whites into almond mixture.
Lightly dust a board with powdered sugar and roll egg white dough to 1/4 inch thickness. Use a cutter dusted with powdered sugar to cut out stars. Using a spatula, carefully lift stars onto baking sheets lined with parchment paper.
Preheat an oven to 300 degrees F. Bake cookies for 12 to 15 minutes, or until set through, remove from oven and brush with glaze. Continue baking for 5 more minutes. Transfer to cooling racks to cool.
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