Combine liquids and sugars: In a medium saucepan, combine the water, granulated white sugar, and brown sugar.
Bring to a boil: Place the saucepan over medium-high heat and bring the mixture to a gentle boil, stirring occasionally until the sugars are completely dissolved. Watch closely so it does not bubble over.
Simmer: Let it boil gently for about 1 to 3 minutes.
Remove from heat: Take the pan off the burner and let it cool down for a few minutes.
Add extracts and extras: Stir in your maple extract, along with the butter, salt, or vanilla extract if you are using them.
Cool and store: Let the syrup cool completely-it will thicken significantly as it drops to room temperature. Pour the finished syrup into a glass mason jar or bottle and store it in the refrigerator.