Email Asking for Appointment Letter of Reccomendation I am planning to ask professors that I haven't seen in two years since graduation for letters of recommendation.

I want to ask in person so they can see and remember me, but I want to set an appointment ahead of time for this meeting. I really don't want to drop in on the during office hours randomly.

I am having trouble thinking of how this email should me worded. 

If I don't allude to the letter of the recommendation and say something like:

*Dear Professor,
I was in your class two years ago. I would like to meet with you to discuss something.
Sincerely,
Student
*

Then they have no idea what I am meeting about. But if I say:

Dear professor
I was in your class two years ago. I got an A+. I would like to meet with you to discuss you writing me a letter of recommendation.
Thanks for your time.

...Then it's like I am just asking over email, which I don't want to do because I haven't seen them in multiple years.

Can anyone think of a better wording for this email? 

Thanks!
You could do sort of a hybrid between an ominous email and a surprise appointment by asking for a letter over email and also asking to meet with them. It could be written something along the lines of:

Dear Dr. Professor

First sentence is a simple introduction stating your first and last name, the class you had with the professor, and the semester/year you had it with them (if the class was a big lecture it could be helpful to also include your grade, but it may not be necessary). This sentence lays out your academic career path (applying to graduate school program in field). This next sentence explains how this professor/class has influenced your academic career path choice. The following sentence asks if the professor would be willing/be comfortable writing you a letter of recommendation. Next, if they are willing/able/comfortable writing you a letter, you would like to arrange a meeting at their convenience to discuss/answer questions. This last sentence thanks them regardless of their reply.

It doesn’t need to be lengthy, but this basic structure allows you to jog the professor’s memory without being too overbearing. It also allows them to have an easy out to decline writing a letter for you (which is beneficial if they do not feel comfortable writing you a strong letter). Remember, it is possible that the professor may not remember you even if you meet in person, or they might completely remember you just by hearing your name again. 

If asking over email is really not your thing, you could make an appointment to discuss graduate school so that the email hasn’t asked for the letter yet, but it’s much less ominous.