My favorite sweet spot in the city is Musette, on Third Avenue. When I first moved to the neighborhood, I thought their beautifully decorated cookies and cakes looked too sophisticated to simply snack on. I was wrong, so wrong! I can actually taste how delicious their Chocolate Mousse cake is from memory alone, and they also boast the creamiest cheesecake. Of course if you are worried about calories though, you may want to wire your jaws if ever walking by this place. The owners are French and very proud of all they produce. They even make flourless cakes for Passover orders.