Mississippi Mud Trifle

1 large box dark chocolate or fudge instant pudding mix
1 large box vanilla instant pudding mix

Prepare each box of pudding separately.

In a trifle bowl, make layers as follows:

2 cups crushed Oreo cookies
1/2 chocolate pudding
1/2 large container Cool Whip
2 cups mini-marshmallows
1/2 cup finely chopped pecans, sprinkled over all
1/2 vanilla pudding
2 cups crushed Oreo cookies
Remaining 1/2 chocolate pudding
1/2 cup finely chopped pecans, sprinkled over all
Remaining 1/2 vanilla pudding
Remaining 1/2 Cool Whip
1 cup crushed Oreo cookies for the top

Chill for several hours before serving.