Put a link to a category round a hard coded A HREF

The “page” in WordPress usually refers to a “PAGE page”, as in only post of page post type. Not any page of the site in general.

What you want to link to is category archive. Something along this should work:

echo get_category_link( 'cooking-sauces' );

If cooking-sauces is slug of a term that belongs to custom taxonomy (as opposed to native category taxonomy) you will probably need to use something like:

echo get_term_link( 'cooking-sauces', 'your-taxonomy-slug' );