I'd been avoiding Bouchon Bakery since it's so expensive, but ended up there with coworkers for coffee one day and gave into their lemon tart.
And became obsessed. I've since tried a bunch of macarons, a fruit tart, the sandwich of the day, a cappuchino, and the tomato soup and none of it is that awesome. My coworkers love getting lunch there, but I have to say, I found most of their food disappointing. I even added half-and-half to their tomato soup, because I found it a bit too sharp for my tastes.
But the lemon tart. I could wax poetic about that fluffy, tangy, creamy, not-too-sweet tart. I've probably had it five or six times since, and given their absurd prices, that's saying quite a bit.
So go ahead, get yourself a lemon tart. Experience the bliss.
They have two locations in New York City, and three others in California and Las Vegas.