Pumpkin Spice Pull-Apart Biscuit Loaf

Preheat the oven to 350°F. Grease a 9x5-inch loaf pan with cooking spray. Combine the brown sugar and the pumpkin pie spice in a small bowl. Separate the biscuits into 2 layers, creating 16 biscuit rounds. Brush one side of each biscuit round with melted butter. Spread 1 Tablespoon of the pumpkin pie filling on each biscuit. Sprinkle the sugar mixture evenly over each biscuit. Layer the biscuits vertically into the prepared pan. Bake until deep golden-brown, about 40-45 minutes. Allow the bread to cool 10 minutes before inverting onto a cooling rack. Meanwhile, whisk together the powdered sugar, milk, maple syrup and vanilla in a small bowl. Drizzle the mixture over the warm loaf and serve.