It's called "so into cupcakes" and it's (as they say) "located just minutes off of highway 401 at Markham Road and Ellesmere". Apparently it's been open since December in the plaza on the north-west corner but the only hint that it's there is the single word "CUPCAKES" in the window that you can see from Ellesmere. There's no entrance street side and you have to drive into the plaza. You'll find it beside the Coffee Culture on the corner.
They sell both minis and regular sized cupcakes, in 13 flavours (all were available on this Friday afternoon around 3pm). We bought a dozen minis for later (passed on the mocha) but my son & I got a regular sized lemon to go.
The lemon: substantial cupcake base, like a lemon flavoured pound cake, which is nice because I was expecting a useless airy american-style cake with nothing to it, lemon flavoured cream cheesey frosting, sweet - but not too sweet, cream cheesy but not overwhelmingly so, and a blup of lemon - I think it's pie filling - on top, in the center of the frosting to identify it as a lemon cupcake. I'd have preferred lemon curd but we can't have everything.
My son gave it a 4-4.5/5. Me too. Not a full 5/5 because my eyes rolled back a little in my head while I was eating it but I didn't pass out. :D
We're planning to taste test the rest later tonight when everyone else gets home. I hope I'll have comments as positive for the other flavours.