Whats the best Caro Kann Variation (as white)?

I want a suitable Variation against the Caro Kann as white which works well against any opening prep someone my elo could possibly have. Any tips? Thanks!

Caro-Kann is played rarely.  I would avoid the classical Bf5 stuff and play a side line.

There are two things I usually recommend to students against the Caro. Actually, I think these recommendations would hold up even into GM level, but they make sense for the club player too I think.

1) The Advance, and specifically the Short Variation (i.e. 3. e5 Bf5 4. Nf3 e6 5. Be2). Next you will castle, if black goes for c5 you may play c3 and/or Be3, your other knight probably goes to d2, and you always have the Nh4 idea potentially winning the bishop pair. 

If the opponent plays 3...c5 just don't play 4. c3, since it's pretty cozy for black there, but instead maybe 4. Nf3 or 4. dxc5 (don't try too hard to hold onto this pawn) and you have some advantage maybe.

2) The Two Knights. 1. e4 c6 2. Nc3 d5 3. Nf3 (or you could develop the knights in the opposite order, it doesn't matter much). There are a few tries the opponent could go for against this, but in all cases I slightly prefer white. On Bg4 you play h3 and you may win the bishop pair. If they take on e4 and play Bf5 you can get them with this famous trap:

The two knights line that is shown is interesting for white, but I'm not sure that black would play ...4 Bf5. Black could easily play ...4 Nf6 in that position.

Yes, or any number of things. I’ve played 4…Nf6 in that position numerous times against all strengths of opponents as black OTB. There are many variations possible. But the thing I had to remember in writing my post is that OP I think is on the beginnerish side, or at least that’s the impression I have. So I didn’t wanna flood with tons of variations. 

There are a lot of good variations depending on your style. Probably the best variation technically is the Advance Short variation as mentioned. This is more positional and white is just playing with the space advantage.

The Panov Attack is also very good.

This is a much more active, aggressive way of playing. It gets black out of their typical Caro structures and is essentially encouraging an IQP position.

White has a lot of open files and diagonals to work with. The bishops are lined up menacingly against the kingside. Another feature is that black has trouble playing Bf5 like in typical Caro Kann lines as white has Qb3.

A lot of lower level players will also play this positional inaccuracy, 4. ...dxc4. This essentially develops white's bishop for free, giving them the ideal IQP position.

Most of what you recommend is just hope chess.

The Tal variation is a good line, but it's not just because the opponent might not see that the bishop gets trapped.

The other variations are just losing if they don't fall for the trap.

This just loses d4 with no compensation.

After Nd7, white has nothing. You can take on h7, winning the pawn back, but then black has Ne5 and it's not worth anything compared to white's terrible position.

"The best" I think is 1) e4 c6 2) d4 d5 3) e5 I mean that if we make a championship of strong chess program it is this variant that I would put to increase the probabilities to win the championship

but otherwise for human against human I'd rather go for 1) e4 c6 2) d4 d5 3) Nc3 dxe4 4) Nxe4 Bf5 5) Ng3 Bg6 6) h4 h6 7) Nf3 Nd7 8) h5 Bh7 9) Bd3 Bxd3 10) Qxd3 e6 11) Bf4 Qa5+ 12) Bd2 Qc7 13) 0-0-0 because after 1) e4 c6 2) d4 d5 3) e5 we are faced with "problems that can upset us" :

a : 3)...c5 this move is annoying because it wants to deviate in a kind of French advance variant defense but without having the problem of the blocked white Bishop (for Black) and 4) dxc5 e6 is an improved variant of :

except that instead of Black playing, it's White but in the end I think we are not very happy to play this variant of the French defense even with one more move.

b : 3)... Bf5 4) Bd3 Bxd3 5) Qxd3 ok but Black is happy to play kind of French advance variant defense without having the problem of the blocked white Bishop (for Black) and White not really.

c : 3)...Bf5 4) Nc3 e6 5) g4 it is have fun but in the long term and by facing more or less players of our level I have the impression that we experience more difficulties with White and that we feel "weak" with White. 

It doesn't say equal. After 5. ...Nd7, it says -0.5.

The entire point of this opening is hoping they fall for the trap. If they don't, you are just worse and there is no value.

The OP asked for "the best" Caro Kann variation for white. You can only evaluate what the best variations are by assuming best play, or at least very good play, by the opponent. Your opening only assumes worst play.

I used to just play 2. d3

Any of classical, panov, advance and two knights are good. It doesn't matter so much which one you pick, what matters is that you learn it well. As there's a good recent book dedicated to the white side of the Panov which is also entry level, I'd say get D'Costa's book and play the Panov.

The Fantasy is the trickiest as it is the best scoring variation against the Caro but I prefer the Tal Variation and all you need is to watch the Gotham Chess video with Nemo to get all you need to play against it. However, I found this very interesting move against 3...c5 that you may want to check out

Play around with it and see how you like it or go with more common stuff

The Fantasy variation is very good, yes.

I don't think it's the best theoretically but it's very aggressive and less likely to result in a draw. In the master's database, white has a higher winrate but black also has a higher winrate. A draw is a less common result than the other popular lines.

Ivanchuk vs Jobava, Caro-Kann, Fantasy Variation.

3.Nc3/Nd2 or 3.e5 are both valid

one of my favorite games. its  how aliens play chess

The Fantasy's winrate is artificially inflated by a large margin as beginners will snap-take on e4 and then not know the theory afterwards. 3... dxe4 4. fxe4 e5 5. Nf3 Bg4 6. Bc4 Nd7 is essentially forced if Black takes the pawn, but 4... e5 looks incredibly unitintuitive if one doesn't know the theory behind it. The best move in the position is 3... e6, transposing either directly to the Steinitz French or with 4... Bg4 to follow.
My recommendation against the Fantasy Variation would be 3... e6 4. Nf3 Bg4 5. Bd2 Ne7 with ideas of either playing 6. h4 Nd7 7. Qe2 e5 8. dxe5 d4 9. Nd1 Bxd2 10. Qxd2 Nxe5 (+=) or 6. a3 Ba5 7. Bd3 Nd7 8. f4 c5 9. e5 c4, trying to play for a draw by locking down the board with all Black's pawns on the light squares and all White's pawns on the dark squares with perfectly even material and king safety, sample line below:

I have wandered around for many years trying to find a line I like against the CK.  I would first try to play a Kings Indian Attack with 2 d3, but these are rather subtle lines.  I should mention that in general I like sharper lines and openings and more dynamic positions.  The CK Advance lines are ok and playable.  They are complicated but that means that there is more opportunity for opponent mistakes, especially the Nc3 and g4 lines.  The Short line maybe not so much.  I've also looked a the exchange variation, which is 3 ed5 ed5, 4 Bd3 followed by Bf4, c3, Nf3, Nbd2, Re1 and such and drop N on e5.  Overall I like lines with N on e5 or a pawn on e5, because as I said, these are sharper lines and more Kside attacking positions.

The best Caro-Kann variation is player dependent.
Exchange is best if you play the Exchange French as White.
Advance (Botvinnik-Carls, Tal, and Short) is best if you're willing to book up on theory.
Mainline (Classical, Karpov, and Tartakower) is slowly falling out of fashion, but it can still compete with the Advance for the title of Mainline.
Breyer w/ Nf3 is the objective best according to supercomputers.
Fantasy is best as a prep surprise weapon targeted against a specific player.
Panov is best if you fully understand IQP positions and Queen's Gambit positions.
Two Knights is best if you just want to play principled chess with little theory involved.

Why?