The Dutchman netted his fourth and fifth goals of the season as Spurs moved above Liverpool into fifth position as Steve Kean's Rovers dropped their third game in their last four outings to remain bottom of the table.
van der Vaart opened the scoring at Ewood Park in the 15th minute when he received a ball from Kyle Walker after his run down the right to slot home with his trusty left past Paul Robinson.
Less than 15 minutes later, Blackburn were able to level when Christopher Samba met Morten Gamst Pedersen's free-kick in the air and nodded down for Mauro Formia who smashed it home to tie things up.
But eight minutes in the second half, van der Vaart made it 2-1 when he got on the end of Benoit Assou-Ekotto's deflected pass and curled it past Robinson to complete his brace.
There were protests against Rovers manager Kean prior to the match with fans clear they want him out and if results don't improve, he surely won't last too long at the helm.
As for Redknapp's Spurs, things are nicely humming along with four wins in their past five league outings and a spot in the top five that they covet so much.
TRIBAL ASKS: Is Steve Kean going to soon be out of a job?