Add the brown sugar and water to a small saucepan over medium heat. Bring it to a boil and then lower the heat.
Simmer, making sure to stir until the sugar has completely dissolved, for 10 minutes.
Remove the simple syrup from the heat and stir in the vanilla extract, butter extract, and almond extract.
Let the syrup cool to room temperature and transfer to an airtight container before storing in the fridge or using.
