Almond Squares - Mandelkuchen

1 cup finely chopped almonds
2 cups sugar
2 cups flour
4 eggs
1 teaspoon cinnamon
1 teaspoon nutmeg
1/2 teaspoon ground cardamom seed
2 teaspoon baking powder
Powdered sugar, for dusting

Sift and mix dry ingredients well, add beaten eggs. Bake 1/2 hour at 350 degrees. Cut into squares while still warm. Ice or dust with powdered sugar.