Preheat oven to 300 degrees
Pour bag of granola (6 cups) into a heat safe bowl.
Warm coconut oil and honey in a saucepan until honey and oil are easily mixed and completely liquefied.
Add vanilla (optional) to granola, then pour honey mixture into the bowl and stir until all granola is wet.
Cook for 20 minutes.
Remove from oven and let completely cool before removing from pan. Voila! Homemade granola bars!