Banana Split Icebox Cake

carton ((16 ounces frozen whipped topping, thawed (or use 3 batches of homemade whipped cream which is about 6 cups of whipped cream)))

sour cream

package ((3.4 ounces instant vanilla pudding mix))

((8 ounces crushed pineapple, drained))

whole graham crackers

medium bananas (, sliced thin)

Toppings: additional sliced bananas and sliced fresh strawberries

Chocolate Drizzle:

heavy cream

semi-sweet chocolate chips