I keep seeing cake servings/cutting guides, but they never include sheets... I made 1/4 sheet for my mom's company picnic and it's a 4 layer torted with cherry mousse and chocolate IMBC and just a simple decoration... I'll post pics if I can figure it out...
But how many serving should this be? And how much would I charge (if it wasn't for my mom)
if it is a layered sheet, we cut 1/2 inch wide by two inches long- wedding size. Paryt size is larger maybe 1 inch wide by 2 inches.
We change 45 for a half sheet and you did a half sheet if you stacked 2 - 9 x 13's and torted them. after you make it, it up to the cutters to cut a certain number of slices.
According to the Wilton charts a 9x13 serves 24 2 inch squares
an 11x15 serves 35 2 inch squares and a 12x18 serves 54 2 inch squares this is for a single layers
Sheets (and squares) are easy to figure, once you know how big the piece of cake will be .... standard sheet cake servings is usually single layer 2x2x2". As mentioned above, if it's a double layer, then it's cut 1x2x4.
here's a thread where I've done the math for you.