we like the CS desserts at Starring Rolls in DHS (limited lunch choices, but very good deli/gourmet sandwich...but get to choose from the yummy bakery desserts)
Love the Minute Maid frozen lemonade at Flametree BBQ in AK - it's prepackaged & frozen pretty solid so great to take with you walking through the park
At Pop, gotta have the tye-dye cheesecake (tastes like regular cheesecake, but zowser, the colors!)
Main Street Bakery/MK is another good place to get sandwich for lunch, and choose from the bakery goodies for dessert.