Issue Essay Time Problem

I have been practicing writing essays and every time I practice I find myself unable to complete my three body paragraphs within the time limit. I usually spend no more than 5 minutes planning and have skipped the introduction and conclusion to give myself more time. I also follow the template Greg recommended.

Is there any advice on how to write faster besides practicing?

Start with giving yourself more time (50 mins) and then reduce by 5 mins each essay.