Don't do it... IT'S A TRAP. I fell in love with their sweet bite sized burgers & my life hadn't been the same ever since.
Their passion fruit macaron is... gluttonously good. Whenever I'm having a bad/stressful day, I tend to turn to Butter Avenue. Granted, this is not a healthy obsession for a number of reasons (to which I'm aware). Their cafe/patisserie has an upper-class upscale feel to it (although I've never personally dined in before).
Without a doubt, this is an amazing gift for a foodie friend. It's a cute surprise/"I'm sorry, I messed up" gift for a girlfriend, sister, mother... It would be a waste on a guy who doesn't appreciate desserts (I'm sorry but at $3 a pop, you're better off buying a sub/sandwich). Last time as I left Butter Avenue with my to-go box of macarons, I passed a couple on their way in. For a brief moment, I heard the guy slightly sigh "this is highway robbery." Ha, can't argue with you bud. But I'm hooked. :(
Do I recommend Butter Avenue? Absolutely! The beauty of living in Toronto is that you have a variety of petite macaron shops within your nearby vicinity. It's a sweet life.