In a small saucepan over medium-low heat, whisk together pumpkin puree and pumpkin pie spice. Cook for about 3 minutes, whisking often—it’ll form a thick paste.
Add brown sugar, maple syrup, and water. Whisk to dissolve the sugar and combine everything smoothly.
Bring the mixture to a gentle simmer (not a boil) and cook for 5 minutes.
Remove from heat and stir in the vanilla extract and a pinch of salt.
Let it cool for 10–15 minutes, then strain through a fine mesh sieve for a smoother syrup.
Store in a sealed jar in the refrigerator for up to 1 week.