Combine water and sugar in a small saucepan and stir to combine.
Bring the mixture to a boil, stirring often.
Once boiling, lower the heat to medium low and let simmer for 7-10 minutes.
Remove the mixture from the heat, add in the butter extract, vanilla extract, almond extract, and salt, and stir to combine.
Let the syrup cool completely before transferring to an airtight container, and store in the fridge for up to two weeks.