Peanut Butter Cup Trifle

1 pan of baked brownies (9x13), cut into 1 inch pieces
1 pkg instant vanilla pudding, 5.1oz
3 cups milk
1/2 cup creamy peanut butter
2 teaspoons vanilla
1 8oz container thawed Cool Whip, divided
20 peanut butter cups, crumbled
6-8 peanut butter cups to garnish

Combine pudding and milk. Beat for 2 minutes. Add peanut butter and vanilla, beat until smooth. Gently fold in 2 cups cool whip.

Layer in trifle dish: 1/2 the brownies, 1/2 the crumbled peanut butter cups, 1/2 the pudding mixture. Repeat. Top with cool whip and peanut butter cups. Chill at least 4 hours before serving.