Visual Editor for Custom Fields?

I created a custom post type to put recipes on a client's website using custom fields for the description, ingredients, directions, and notes. I've now got it to where it runs each of those (on the front end) through the "the_content" filter so things are formatted correctly with regards to hard returns and such.

Here's my question: Is it possible to have each of those custom fields (on the admin side) have a visual editor like what the content usually has? I don't want the people who are putting the recipes into the website to have to know anything about HTML but to be able to easily format their text.