How to enqueue scripts on custom post add/edit pages?

You can do it like this (put in your functions.php) :

function add_admin_scripts( $hook ) {

    global $post;

    if ( $hook == 'post-new.php' || $hook == 'post.php' ) {
        if ( 'recipes' === $post->post_type ) {     
            wp_enqueue_script(  'myscript', get_stylesheet_directory_uri().'/js/myscript.js' );
        }
    }
}
add_action( 'admin_enqueue_scripts', 'add_admin_scripts', 10, 1 );