The Irish star provided a fitting finish to an amazing 70-yard run from midfielder Michael Brown for what turned out to be the winner in the 56th minute.
It was just the tonic required after the disappointment of going out of the Carling Cup quarter-finals on penalties against Liverpool on Wednesday night and built on last Sunday's 2-0 win against Middlesbrough.
The key to the win was a faultless defensive performance with the central pairing of Ledley King and Noureddine Naybet snuffing out the threat of the two Pauls, Dickov and Gallagher, and Stephen Kelly making a fine return from injury at right-back.
Clear-cut chances were at a premium throughout and Paul Robinson was only forced into one save of any note as he tipped away Gallagher's effort a minute in the second half.
Indeed, Rovers only had one effort on goal in the first half - Andy Todd volleying just wide - whereas we looked the brighter in possession, especially in the final third where Keane, Pedro Mendes, Reto Ziegler and Jermain Defoe worked some nice triangles.
However, all that work only resulted in long shots from Defoe, Keane and Brown with our best chance falling to Defoe just before the whistle, onto Keane's clever reverse pass only for Friedel to deflect the ball onto the roof of the net.
Rovers started better after the interval, Robinson did well to save from Gallagher but we then scored on the break.
Brown deserves all the credit after an amazing 70-yard run that started with him breaking up play just outside our area and somehow shrugging off Tugay as he tried to bring him down. He then cut inside Johansson and across to the left side of the area where he looked up, saw Keane supporting and rolled the perfect pass for the striker to finish with style from 12 yards.
Friedel saved well from Defoe and an expected siege from Rovers never really arrived.
Naybet did superbly to clear from Dickov and David Thompson fired just over but with the arrival of Anthony Gardner further shoring things up at the back, we held on with little fuss.
GUIDE TO THE ACTION
2mins: Early break as Keane won flick, Mendes down the right slipped ball back to Keane, into box, tried to pull back to Defoe but cut out.
7mins: Good start continues, popped ball around in midfield, Keane into Defoe who shifted ball away from Short and curled straight at Friedel from 20 yards.
11mins: Another good break down right side, this time Kelly's cross from byline cut out.
21mins: Keane stepped over Mendes pass from right flank, got ball back from Defoe, left-foot shot from 22 yards deflected wide.
28mins: YELLOW. Dickov for late tackle on Naybet. Also made needless late tackle that took King into advertising boards a few minutes ago.
36mins: CLOSE. Blackburn's first effort and best chance so far, Short nodded quickly-taken free-kick back to Todd who volleyed just wide from 16 yards.
38mins: Another decent move, Carrick into Keane who fed Brown, turned away from two defenders and struck left-foot shot well but straight at Friedel.
41mins: CLOSE. Lovely exchange between Keane and Ziegler, Keane reverse ball into Defoe who got wrong side of Short but had to shoot quickly, Friedel out to narrow angle and deflected ball onto roof of net.
Half-time: Rovers 0, Spurs 0
46mins: SAVE. Dickov work down the left flank, managed to get cross in controlled by Gallagher who turned and shot from eight yards but Robinson alert to tip around post.
52mins: YELLOW. Tugay for foul on Brown.
54mins: Decent volley from Mendes after Atouba's throw was only half-cleared but straight down Friedel's throat.
56mins: GOAL. Break from Blackburn pressure, Brown intercepted play, somehow managed to shake off Tugay who tried to bring him down and then travelled fully 70 yards with ball, past Johansson, into box, squared to supporting Keane who made no mistake from 12 yards.
Blackburn 0, Spurs 1
57mins: SUB. Bothroyd for Gallagher.
58mins: Bothroyd half-chance from Emerton's cross, didn't get direction of header right.
60mins: Defoe almost onto ball over the top but Todd covered well.
62mins: Kelly down right, laid ball back to Defoe who spun and hit fierce drive from 22 yards that Friedel saved with feet.
65mins: SUB. Thompson for Tugay.
73mins: SUB. Redknapp for Ziegler.
75mins: Superb clearance in front of goal by Naybet after Todd nodded Emerton's deep cross back towards Dickov.
76mins: Thompson 20-yarder flashed inches over although Robinson right behind it.
76mins: Bothroyd blasted into stand from Emerton's knock down.
77mins: SUB. Gardner for Keane.
82mins: YELLOW. Thompson for deliberate handball.
85mins: SUB. Matteo for Short.
88mins: SUB. Kanoute for Defoe.
Injury time: YELLOW. Naybet for kicking ball away.
Injury time: Wall did job to block Reid's 18-yard free-kick, Dickov then shot straight at Robinson.
Final score: Blackburn 0, Spurs 1
Line-ups: Blackburn Rovers: Friedel, Neill, Short (Matteo, 85), Emerton, Tugay (Thompson, 65), Dickov, Johansson, Ferguson, Reid, Gallagher (Bothroyd, 57), Todd. Subs: Enckleman, Flitcroft.
Spurs (4-4-2): Robinson; Kelly, Naybet, King, Atouba; Ziegler (Ziegler, 73), Carrick, Mendes, Brown; Defoe (Kanoute, 88), Keane (Gardner, 77). Subs: Fulop, Pamarot.
Referee: Mike Dean.
Attendance: 22, 182.
Robbie Keane struck at Ewood Park to secure back-to-back league wins and lift us up to 12th in the Barclays Premiership on Saturday night.