In a large bowl, combine 1/3 cup bread crumbs, green onions, red pepper, egg, mayonnaise, lemon juice, garlic powder and cayenne; fold in crab., Place remaining bread crumbs in a shallow bowl. Divide mixture into eight portions; shape into 2-in. balls. Gently coat in bread crumbs and shape into 1/2-in.-thick patties., In a large nonstick skillet, heat butter over medium-high heat. Add crab cakes; cook until golden brown, 3-4 minutes on each side.