Spray a 12-well classic cupcake pan with nonstick cooking spray and line each well with an egg roll wrapper, creating a cup. Divide the crab mixture among the wells, leaving the wrapper open. Bake until the egg roll wrapper is golden brown and crispy at the edges, 20-25 minutes. Let the egg rolls rest in the pan for 5 minutes, then use your hands to lift them from the pan, using the wrappers as handles. Garnish the egg rolls with fresh scallions.