Welbeck, 35, shone for the Seagulls, earning him a week-high Flashscore player rating of 9.0.
He nodded Brighton in front by towering over Liverpool's Ibrahima Konate and tapped in his second 10 minutes after half-time.
It meant Welbeck recorded a career best goal tally in the Premier League, currently sitting on 12 for the campaign.
Brighton are next in action away to Burnley on April 11th after the international break.