What could be better than gingerbread and pumpkin combined in an easy to make dessert? I have seen a number of different trifles like this, and found this simplified recipe on Taste of Home, and instantly decided this was the one, simply because of prep time with the pre-packaged mix's.
2 packages (14-1/2 ounces each) gingerbread cake mix
1 package (4.6 ounces) cook-and-serve vanilla pudding mix
3 cups milk
1 can (29 ounces) solid-pack pumpkin
1/2 cup packed brown sugar
1 carton (12 ounces) frozen whipped topping, thawed, divided
Prepare and bake gingerbread according to package directions, using two greased 9-in. round baking pans. Cool completely on wire racks.
Meanwhile, for pudding, in a large saucepan, combine pudding mix and milk; stir until smooth. Cook and stir over medium heat until mixture comes to a boil. Cook and stir 1-2 minutes longer or until thickened. Remove from the heat; cool to room temperature. Combine pumpkin and brown sugar; stir into pudding.
In a 4-qt. glass serving bowl, crumble one gingerbread cake; gently press down. Top with half of pudding mixture and whipped topping. Repeat layers. Cover and refrigerate overnight. You can garnish with crushed gingersnaps if desired.