These burgers use half the meat of all-beef burgers but have double the juiciness, thanks to finely chopped cremini mushrooms The raw mushrooms lend earthy, meaty flavor and texture, both of which become more accentuated as they cook, caramelize and crisp along the edges while charring on the grill Form the patties when ready to cook, since the mushrooms start to release water once mixed with the beef, and don't be afraid to mix the chopped mushrooms with the beef until well incorporated