The microwave can be your best friend in the kitchen. Drying herbs in the microwave is a very simple process. This works for any kind of leaves or herb. The pretty color it retains when dried in a microwave is one of the greatest advantages.
Take about a cup of pudina or mint leaves, spread them on a microwave safe plate.
Start with 30 second increments and keep checking to see if the leaves are dry.
Once dry they should crumble easily to a fine powder.
Remember to keep checking every 30 secs until done.