Add pumpkin puree and maple syrup to slow cooker
Stir the pumpkin mixture together until the pumpkin is completely blended with the pure maple syrup
Now add apple cider, pumpkin pie spice, vanilla, lemon juice, salt, and cinnamon sticks (or ground cinnamon)
Turn your slow cooker to low for 5-6 hours or high for 4 hours stirring every 45 minutes. You will know the pumpkin butter is done when the color has deepened and the pumpkin puree mixture has thickened.
Taste to see if you need to adjust seasonings adding more brown sugar or pure maple syrup for sweetness, cinnamon or pumpkin pie spice for flavor, lemon juice for acidity.
Let completly cool for up to one hour before adding to mason jars or air -tight container
store in the refregerator in an airtight container or mason jar for up to 3 weeks or in the freezer for up to 3 months