1. Bake cake according to directions. Let cool, and then slice into 3 sections. Make 1” cubes of each section.
2. Mix together pudding mix and milk in a bowl. Fold in cool whip.
3. Assemble trifle: Layer 1/3 cake, 1/3 pudding, 1/3 crushed oreos. Repeat 2 more times to have 9 total layers! (You should end with the crushed oreos for the “dirt”)
4. Insert peeps with a toothpick to stand straight up. Decorate with edible grass and mini candy eggs.