The <h1> tag is usually reserved for the recipe post title.
Most of your content sections will use the <h2> header tag to denote important sections.
The <h3> tag can be used to filter down sub-sections under an <h2>.
<h4> and below are rarely used, except in very long-form content.
Now we’re getting really nitty-gritty. Are you a food lawyer? You may eventually need an <h5> sub-sub-sub-section.
We have styling for <h6>, but you’ll probably never use it. It’s a silly tag.85