i'm re-posting here, after reading other posts below.i made these bars, so maybe i can help clear up any recipe direction confusion.
basically, you mix the dry ingredients with the butter to make crumbly mixture. set aside 2 cups for the topping. the remainder gets pressed into the bottom of the greased 13*9 pan for the crust, or the bottom of the bar. bake it. meantime, mix your wet ingredients. pour wet ingredient mixture over crust.(this will be the middle of your bar). Sprinkle the 2 cups of dry crumbly mix you reserved earlier over the wet layer and bake it again.
if you didn't taste enough lemon, try the suggestion i saw below about waiting till the next day.
it's not just crackers on the top. it's a crumbly version of the crust.
they should taste sweet and salty.
hope this helps someone.