It’s Father’s Day tomorrow. Why not be the ‘sweet-heart’ this year and make a yummy cookie for your dad? What you’ll need 2 cups all-purpose flour, plus more for surface 1/2 teaspoon baking powder 1/4 teaspoon coarse salt 3/4 teaspoon poppy seeds 1 stick unsalted butter, softened 1 cup sugar 1 large egg 1…