Preheat oven to 350 degrees F. Grease an 8x8-inch pan with coconut oil and set aside.
In a medium bowl, whisk together the peanut butter, powdered sugar and milk. Gently fold in the cut biscuits pieces and blueberries. Dump into prepared pan. Dollop with the blueberry jam and swirl slightly with a knife.
Bake for 30 to 35 minutes, until center is no longer doughy.