A person who adds sugar to things.
A sugarer might make things taste better, but too much sugar isn't good for you.
Examples:
The sugarer puts sugar in the tea.
I don't want to be a sugarer because too much sugar is bad for you.
The sugarer adds sugar to the cake.
The sugarer makes everything too sweet!
The sugarer puts so much sugar in the cookies, they taste like candy.
The sugarer is the one who makes everything taste so good.