Crumble together the flour, butter & sugar until they resemble crumbs.
Sprinkle it mixture all over the base of a baking dish, and press down into place.
Like this. My baking dish is slightly smaller than a 9x13"; the mixture was sufficient.
Bake at 350F for 20 mins or until lightly brown.
Meanwhile, empty your jam/jelly in a big bowl; beat until liquified yet thick. I used apricot jam.
The base is lightly browned..
Pour the liquified jam over the hot base. Even out the layer using a spatula or a spoon, and stick back into the oven for 18 mins.
Cool completely, which takes at least about 2 hours because the jam is friggin' hot and bubbling!!! Don't even think of sticking your finger in it!!!😱
Cut into bars. If you are using tangy jam, sprinkle powdered sugar. If you have a super sweet-tooth, sprinkle powdered sugar 😋