Carefully separate each biscuit into two layers, making a total of 16 pieces. Coat each piece in the sugar mixture and then top with a dollop of the pumpkin mixture. Repeat with remaining ingredients, making stacks of 4-6 biscuits. Place in a row in the prepared loaf pan. Sprinkle with any remaining sugar mixture.
Bake 40-45 minutes or until the center is set. Remove from the oven and allow to cool for 10 minutes before serving. Invert bread onto a serving plate and drizzle with icing, recipe follows.
For the icing
In a small bowl whisk all of the icing ingredients together until smooth. Drizzle over the warm bread and serve immediately.