Cake – Substituting soy milk for regular (cow) milk in crepes/pancakes

Crepes do not contain baking powder or baking soda for leavening. They also typically use melted butter vs. oil in pancakes and have a higher liquid to flour ratio. Basic crepes contain only eggs, milk, water, a pinch of salt and flour.

You can however make them more sweet or savory by adding chopped herbs or a bit of sugar (not too much or you'll have too much browning), cocoa powder, spices such as cinnamon, nutmeg, ginger, etc.

For additional help & recipe for Black Forest Cherry Crepes: Tips for Successful Crepes

The short answer is yes; the longer answer depends on what kind of soy milk you're buying and how you plan to use it. I've used soy milk in my breads and cakes without noticing much of a difference in texture, but I use the unflavored, unsweetened versions of it (especially in cake-baking, as many recipes call for vanilla and some soy milks have vanilla in them). I avoid "light" soy milk when making creamy dishes or sauces because I want them to have the creamiest texture possible. If you're using soy milk in a soup or stew, don't allow it to boil because that can cause the "milk" to curdle (and add your acids at the end of cooking, also to avoid curdling). Oh, and be aware that some brands of soy milk are very sweet (you can buy it unsweetened, though); the sweetness might not work well in some dishes.