To make a snowflake cookie you will need:
Outline and flood the snowflake cookies with white glaze.
Allow to dry for 30 minutes or more.
Add snowflake details as you desire.
This photo just shows one simple pattern......there are MANY possibilities.
Look at snowflake clipart/pictures and find patterns to emulate.
Once the snowflakes have dried overnight,
brush on some pearl sheen airbrush color (or some pearl luster dust mixed with almond extract)
to give them a gorgeous shine.