It didn't include a peanut butter icing recipe so I found one online and added it to the instructions.
Ingredients:
1 cake (yellow mix or made from scratch pound cake of you choice) cut into squares
32 oz. container of vanilla yogurt
3 cups (approx.) of peanut butter icing
4-5 ripe bananas
Instructions:
Stir peanut butter icing into the yogurt; mix well
Slice bananas
Layer trifle with sliced cake, yogurt mix and bananas
Repeat layers until full
(Peanut butter icing recipe)
1 stick butter
1/2 cup peanut butter
1/3 cup milk
4 cups powdered sugar
Mix together in a saucepan butter, peanut butter, and milk. Bring to a boil.
Turn off heat and add powdered sugar. Mix well. I had to double this recipe to get
the amount of cups the trifle recipe called for.