$loop = new WP_Query(array(
    'post_type' => 'recipes',
    'tax_query' => array(
        array(
            'taxonomy' => 'ingredients',
            'field' => 'slug',
            'terms' => $ingredients
        )
    ),
    'paged' => get_query_var('paged') ? get_query_var('paged') : 1
));