Orange Zest and Cardamom Sugar Cookies

Name: Orange Zest and Cardamom Sugar Cookies
Cuisine: American
Ingredients: 3 cups (360 gms) all purpose flour; ½ tsp baking powder; 1 tsp freshly ground cardamom; ½ tsp salt; 1 ¼ cup (250 gms) granulated sugar; 1 cup (2 sticks; 226 gms) unsalted butter, at room temperature; 1 tbsp orange zest; 1 large egg; 1 tbsp vanilla extract; Extra flour for rolling; 2 inch round cutter; 4 cups confectioner’s sugar; 3 tbsp meringue powder; 6 to 8 tbsp warm water; Americolor gel colors; 12 inch piping bags; 6 mini rubber spatulas; Chefmaster edible pens