Billy McKay scored for a seventh consecutive match as his double and goals from Owain Tudur-Jones and Andrew Shinnie sent Caley Thistle back into second in the Scottish Premier League.
Butcher's team have already matched last season's goal tally in the league and he is glad his players have discovered a ruthless instinct in front of goal.
"I've forgotten last year, thanks for reminding me," he said."I'm just delighted it's another win and we have scored a good number of goals again.
"We could have had more, Rab Douglas has had a great game.
"If you had said at the start of the season, by Christmas we would be second in the league, I would have said you have had a few glasses.
"But we are where we are and we will certainly enjoy Christmas."
Butcher was full of praise for McKay's goalscoring exploits which have helped Inverness rise up the table in recent weeks.
"We have good quality going forward and if you give people like Andy Shinnie space then he is going to score. And Billy always scores," he said.
"The second goal was like an Inspector Gadget leg coming from somewhere and plays the ball.
"It was the most bizarre goal I've seen for a long, long while and I was just delighted to see it go in Dundee's goal.
"We have scored again, for a 24th game, and Billy's on fire."