At first glance, these bars may look like every other fruit crumble bar you’ve had, but they have a secret. Between the jammy fruit and buttery shortbread is a bonus layer of sweetened cream cheese you never knew you needed until now. Wild blueberries are less watery than conventional blueberries and have a more concentrated blueberry flavor that works beautifully in this recipe. They are available frozen and need not be thawed before using, but you can use whichever variety you find. These bars will be delicious no matter what.