Add the milk and chocolate chips to a small bowl and melt gently over a pan of simmering water or very carefully in the microwave.
Drizzle over the top of the bars and refrigerate until set.
If you want to make the granola bars nut free then omit the pecans and add 1/3 cup of extra oats or some pumpkin seeds to compensate. If you cannot get hold of rice syrup then agave nectar would be a good substitute. Also in the UK Golden Syrup would work. If you use any of these substitutions I would omit the sugar from the recipe as they are all sweeter than rice syrup.If you cannot get Pumpkin Pie Spice where you are, it is very simple to make yourself and great for adding to all sorts of baked goods like apple pies or cakes. Here is a very simple recipe which uses the same ingredients as my pumpkin pie spice and you probably already have the spices in your store cupboard. These granola bars are best stored in an air tight container in the fridge. They will keep for a couple of weeks that way.