Munn Cookies

Step 1
Preheat the oven to 350 degrees F (175 degrees C). Line baking sheets with parchment paper.

Step 2
Stir together the flour, poppy seeds, baking powder, and salt.

Step 3
In a medium bowl cream butter and sugar together until light; beat in egg yolk, lemon zest, and lemon juice. Fold in flour mixture and mix well.

Step 4
Divide dough in half and roll each half out on a lightly floured surface until 1/8- to 1/4-inch thick. Cut with cookie cutters and place cookies on the prepared baking sheet. Brush the tops of cookies with beaten egg white and sprinkle with white sugar.

Step 5
Bake at 350 degrees F (175 degrees C) for 12 to 15 minutes or until golden, the edges should be light brown.