Stir together first 6 ingredients in a large bowl; gently fold in crabmeat and breadcrumbs.
Shape mixture into 10 patties.
Heat 1/2 tablespoon butter and 1/2 tablespoon oil in a large nonstick skillet over medium-high heat. Cook 5 crab cake patties 4 minutes on each side or until golden. Place crab cakes on paper towels to drain. Repeat procedure with remaining 1/2 tablespoon butter, remaining 1/2 tablespoon oil, and crab cake patties.