Ok, everyone knows there are hundreds of great burger spots all across Missouri. But when it comes to unforgettable patties, two standouts deserve special recognition: Black Sheep Burgers & Shakes in Springfield dazzles with their creative combinations and boozy shakes, while St. Louis’ Jack Nolen’s has mastered the art of the smash burger with their signature blend of brisket, chuck, and short rib that creates pure burger bliss…