In a medium bowl whisk together the pudding mix, cold milk, pumpkin puree and pumpkin pie spice. Whisk for 2 minutes until the pudding thickens, set aside.
Meanwhile, place the brioche cubes in a shallow bowl. Pour liqueur over the top and let soak for 2 to 3 minutes.
In a small bowl combined sour cream, honey and cinnamon. Mix until well blended.
In a trifle dish, layer half of the brioche, then half pudding, then remaining brioche and remaining pudding so that you have 2 layers of each. Top with a dollop of the sour cream mixture and sprinkle with butterscotch chips.
If you want to make individual serving sived trifles, simply follow the above steps. When it comes time to place everything into your dish, just use smaller amounts than what is listed above.