Demo

Array
(
    [s] => buttercream
    [posts_per_page] => 10
    [cache_results] => 
    [update_post_meta_cache] => 
    [update_post_term_cache] => 
    [no_found_rows] => 1
    [post_status] => Array
        (
            [0] => publish
            [1] => inherit
        )

    [post__not_in] => Array
        (
            [0] => 2
        )

    [post_type] => Array
        (
            [0] => product
        )

    [tax_query] => Array
        (
            [relation] => AND
            [0] => Array
                (
                    [taxonomy] => product_tag
                    [field] => name
                    [terms] => buttercream
                )

        )

)