Preheat the oven to 375°F.
In a bowl, stir ground almonds, flour and sugar together.
Mix egg whites, almond and lemon extract gradually.
Combine the almond mixture into egg whites.
Line cookie sheet with parchment paper.
Drop rounded tablespoon flour onto cookie sheet, leaving about 1.5 inches between cookies.
Bake 12 to 15 minutes, until cookies are lightly browned.
The cookies can be remove from oven.