1. Combine ½ cup sugar, water and vanilla in a heavy pot.
2. Cook over low heat and stir until sugar is dissolved.
3. Add cranberries and continue to cook for 5 minutes.
4. Remove from heat and let stand covered overnight.
5. Drain cranberries than coat with remaining sugar.
6. Place in a single layer on a baking sheet and let dry at least 30 minutes.
Tip: Serve as a garnish over desserts, or with nuts and cheese.