I got this recipe from my girlfriend, after tasting this at her house party, I have been making these bars ever since, they are so delicious, and very rich, also, I have made these for parties, cut them small and served them in tiny muffin cups....I have never had any leftover. Also, I have used this base mix recipe, omiting the preserves of course, in lots of other recipes that call for a base, it always turns out flakey and light, with a wonderful buttery taste! (note: prepare ahead, these squares have to stay in the fridge overnight)