Prepare Vanilla Pods: Toast the saved vanilla pods and ensure the blender blade and bowl are dry.
Initial Mixing: Place the dry toasted vanilla pods in the blender bowl and add half of the powdered sugar.
Pulse Vanilla Pods: Pulse the blender until the vanilla pods begin breaking down, then stop and scrape down the sides.
Add Remaining Sugar: Add the remaining powdered sugar and continue blending until the mixture turns into a fine gray powder.
Sift Vanilla Sugar: Pass the freshly made vanilla sugar through a fine sieve (shininoa) to remove any larger pieces.
Optional: Use Vanilla Bean: To open and use a vanilla bean, flatten it with the back of a knife, make a shallow lengthwise cut, and scrape out the vanilla seeds (caviar). Infuse the seeds and pod for 48 hours to maximize flavor extraction.
Reuse Vanilla Pods: Rinse the used vanilla pods under water, cut into thin strips, dry them, and use as decoration for desserts, cakes, and pies.