Hey Megan!
Lots of thoughts on this. 
I’ve worked doing writing in a variety of capacities for a variety of industries and did for a food blogger, so have seen lots of sides of how this works.
So, actually, I think that for most food bloggers hiring an EDITOR or something like a COMMUNICATIONS MANAGER and not a writer would be much easier and more beneficial. Then you can sit down and quickly write out whatever you want and it will be in your voice, and the other person will edit for grammar and clarity, or with a comms person, do editing, scheduling, managing the whole shebang.
If you hired a hire a writer, you do then have to spend time creating a style guide and making sure they can match it. You will still have to do either extensive notes or editing, as the person writing won’t know about your recipe. You’ll likely have to shift the way/when you create your recipes, etc. to give the writer plenty of time to write. IDK, feels way more complicated to me for where most food bloggers are at with their businesses.
With and editor, you would write everything, and send it over. So it would be in your voice, and would be what you wanted to say. For most people the writing doesn’t take as much time as editing anyway. It seems like this structure would also cost less.
For something like a communications manager (or there are social media managers, etc.) they could take on editing, scheduling, brainstorming for the future with you. There are probably some VA’s who do this also.
When I started working with food bloggers, everyone seems to using the term “VA” almost exclusively, where outside this industry there seems to be a wider range of titles and what someone might be hired to do.
I think it really goes back to what do you want to do in your business, and how do you want to define it all? How important is it that everything is from you specifically? What are some of your ultimate goals? I wouldn’t stop writing just because it takes a lot of time. Writing is a fundamental part of being a blogger
And yes, it takes tons of time. But, if you don’t like it or feel that you want to focus your time in your business elsewhere, then it’s something to think about doing!