Step 1

In a large mixing bowl, cream together the butter, cream cheese, and powdered sugar until fluffy. Set aside.

Step 2

In a bowl, whisk together the milk with instant pudding, until no clumps appear.

Step 3

Pour pudding mix into cream cheese mixture. Beat until well blended, scraping down the sides of the bowl as needed.

Step 4

Fold in Cool Whip.

Step 5

Arrange in a 13x9 dish by ppressing half the Oreos on bottom, topped with the filling and then topped with the remaining oreos.

Step 6

Refrigerate for at least 2 hours until set. When ready to serve, sprinkle top of cake with M&M's candy and add one PEEP to each slice of cake.