Le Dolci is one of the finest places to learn how to make cup cakes in Toronto. My mouth is watering just looking at their website. They have some really incredible cupcake designs. Checkout these:
My favorite thing about the Le Dolci folks is their classes. They have an events calendar so you can learn how to make them yourself! Once you get back home from their class you can impress all your dinner guests with your own cupcake creations.
Their online store is great when you run out of supplies. Check their store out here.