What is the best way to: How do I prepare dry ingredients to make macarons?

OPT: * Sift the powdered sugar, 1/3 at a time. Now sift the almond flour the same way, in the same bowl. Now whisk it until it's thoroughly combined; * Sift the powdered sugar, 1/3 at a time. Now sift the almond flour the same way, in the same kitchen scale. Now whisk it until it's thoroughly combined;
Answer:
Sift the powdered sugar, 1/3 at a time. Now sift the almond flour the same way, in the same bowl. Now whisk it until it's thoroughly combined