1Line 15x10-inch pan with sides with waxed paper. In heavy 3-quart saucepan, stir together granulated sugar, brown sugar, butter, milk and corn syrup. Heat to boiling over medium heat, stirring constantly. Boil 7 to 8 minutes, stirring constantly, to 234°F on candy thermometer or until small amount of mixture dropped into a cup of very cold water forms a ball that flattens when removed from water.
2Remove from heat; vigorously stir in pecans. Spoon mixture into pan, spreading in even layer. Let stand 20 minutes or until firm. Break into pieces. Store in airtight container at room temperature up to 1 week.