Fabulous! You can't get graham crackers in the UK, so I made a biscuit base by melting 2oz butter with 2 tbsp golden syrup, then stirring in 6oz crushed bourbon biscuits (Oreo cookies would probably be the closest US equivalent). I then pressed this into the base of the tin and chilled it while making the topping. Not only did it add a delicious chocolatey flavour, but it also provided a lovely colour contrast with the light brown topping. I used real butter, ordinary peanut butter and digestive biscuit crumbs for the topping and had no problems with it being too sloppy, even when stored at room temperature.
The flavor of this is FABULOUS! My only problem is that the topping was too goopy to cut this into squares. In the future I will just use it as a dip for graham crackers. I used natural unsweetened peanut butter, gold n' soft tub margarine, honey graham crackers and semi sweet chocolate chips melted and spread over the top. I did wonder if butter would make it firmer when refrigerated? Made for 1-2-3 hit wonders.
I made this for my DS using regular PB, also I increased the vanilla to 1 teaspoon, this is a wonderful easy no-bake recipe that I will make again, thanks Reds!...Kitten:)