I have this saved in my favorites - its the best way to cut any number, unless you want to make a double sheet cake and trace/freehand a #5 as a cutout. Either way, I would definitely do it as 2 layers. When I made a 3 for a family party, (my thomas train photo in my gallery) I actually did 3 layers and freehand made the number. Good luck!
http://cakecentral.com/gallery/1111573 this is the way to cut any number - thanks to the person who posted it!!
Circle and two loaves. Don't cut too much inside the circle as the diagrams usually say. Make a chunky 5.
http://cakecentral.com/gallery/1707036
I made a #5, (had to do it with a grandmother so that she wouldn't feel left out), so I drew it in Illustrator with measurements. It's a 10" circle plus two loaves of 7.5 x 3.75 inches each.
I can save a JPG out of it. PM me with your email address and I'll send it to you.
Not sure if that's too much cake for you, but you can always print out the jpg and reduce the size according to it.
I just don't ever worry about servings. I'm a hobby baker and if there's cake left, it's OK.
I could also resize it for you and give you new measurements, according to the advice you get about servings.
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