Creamy Blackberry Jam Cookie Filling

What's better than two of your favorite cookies? Two of your favorite cookies stuffed with a flavorful, creamy jam filling.

Image + recipe by Molly Hopkins

2 cups powdered sugar
1 tsp. vanilla extract
4 tsp. Blackberry Mulled Merlot Jam (or Trade Street flavor of choice)
1 stick butter (room temp.)
1 package (8 oz.) cream cheese