Banana Cream Pie with Cake Mix Crust | Reader's Digest Canada

Ingredients

• 1 package yellow cake mix (regular size, divided)
• 1 large egg (room temperature, lightly beaten)
• 3 tbsp butter (softened and divided)
• 1 cup 2% milk (cold)
• 1 package instant banana cream pudding mix ((3.4 oz.))
• 1 medium banana (sliced)
• 1 carton frozen whipped topping ((8 oz.), thawed and divided)
• 1/3 cup creamy peanut butter
• additional sliced ripe banana