Spray a 12x17 cooking pan with cooking oil and set aside.
Cream butter and sugar in a large mixing bowl. Beat in eggs, lemon zest, poppy seeds, lemon juice, vanilla and almond extract. Beat till well blended. In a medium bowl sift together flour, salt, and baking powder in a small bowl. Stir in the flour mixture to the sugar mixture.
Press sugar cookie dough into the prepared cooking pan. Place in preheated oven and bake for 18-20 minutes. Remove from oven and allow to completely cool. Cut into 24 squares.