Pour corn syrup, sugar, water, cinnamon, pumpkin pie spice & nutmeg in 2 qt saucepan.
Whisk to combine & heat over med-high heat until it comes to a boil
Whisk constantly - let boil & cook 3-5 minutes
Remove from heat & slowly pour in evaporated milk- whisking the entire time.
Whisk in vanilla
Transfer to airtight container - store in refrigerator
Heat in microwave before serving