Place all ingredients together in a pot and mix together well.
Heat on low heat stirring frequently to create a butter. Make sure that the sugar is completely dissolved. Do not let it boil or burn.
Heat for 10-15 minutes or until as caramelized as you'd like. Pull off heat and set aside.
Heat water and dark brown sugar together until the liquid simmers/boils and the sugar completely dissolves. Set aside.
Mix syrup and butternut butter together until smooth. Can be blended together and strained.
Chill and add to coffee.