This Irish dessert was introduced to me by my mother in law after she lived there for three years. I like to make it in a pie dish and put the crust up the edges (like a pie) but it can also be made flat with a square dish, with the crust just on the bottom (not up the sides).
1--Crumb crust (I use a graham cracker crust, although I used 2/3 graham crackers and 1/3 almonds--just toss them into the food processor, first process the almonds, then add & process the crackers, then add the butter and a half portion of sugar because banoffi does not need any extra sugar in the crust!)
2--1 can of sweetened condensed milk which has been cooked into dulce de leche (put the unopened can into a pan of boiling water, cover, and simmer for about 90 minutes, checking periodically to add more water so that it does not boil dry. Lay the can on its side so it can roll, if you put it on its end the contents will scorch on that end.)
let it cool before adding final layers
4--whipped cream (I whipped about 1 cup of cream, and added a few Tbs of sugar and 1 tsp of vanilla)
5--top with chocolate shavings (or smashed/processed chocolate chips ☺)
Put it in the fridge for at least a couple of hours to set up before serving. This is a great make-ahead dessert, and was the finale of our Irish Feast for St Patrick's Day this year.