Easy Crème Fraîche
In Mexican cooking, the cream used is more akin to crème fraîche. In Toronto, I haven't found many places where you can buy it (La Tortillería sells Mexican-style cream).
Here is an easy, if time-consuming, way of making crème fraîche, straight from the cookbook The New Basics Cookbook by Lunkins & Rosso.
Ingredients
Equal parts sour cream and whipping cream
Mix the cream until you have no lumps.
Set aside in a warm place in the kitchen for 12 hours.
Refrigerate for 24 hours.
Notes
I like to make a good batch (a liter) of crème fraîche, because we use it in so many ways (strawberries and cream, for example).