For blog posts, the reference entry looks much the same as the one for online periodicals. The difference is you should include the full date of the article publication and the title of the periodical, or in this case, blog website. See Example 17 in Chapter 10 of APA 7. Here is the reference for a Writing Center blog post:

Pezalla, A. (2011, April 18). Using verbs carefully. Walden University Writing Center Blog. https://waldenwritingcenter.blogspot.com/2011/04/using-verbs-carefully.html