I have a cake for 175 for late next week. They are wanting 2 stacked, diiferent size, sheet cakes. Would a full sheet on the bottom (2, 12x18x2) & a single 12x18x2 on top be enough or will I need to make more? I have usually just used to full sized stacked & then they can be generous with portions, but they want the different sizes.
TIA
BellaRosa
Sorry I don't know but you can use the cake matrix it might help you. It's pinned at the top of the business forum. : )
What is the cake for ~ a wedding or a party? I'm assuming a party.
One 12 x 18 (2-layer) will serve 72 party-size servings according to Wilton.
Here's how you get that figure for a 2-layer which will be 4" tall:
18 / 1.5 = 12 (The length divided by 1 1/2" cut)
12 / 2 = 6 (The width divided by a 2" cut)
12 x 6 = 72
Are you wanting to add another 12 x 18 on top that will be supported and doweled so they can remove it to be cut?
You mentioned that they want different sizes. If you put another 12 x 18 on top that would just be a 3-layer cake ~ not 2 different sizes.
I place 2 of the 12x18x2 side byside to = a full size sheet cake. This typically feeds about a 100 for party size pieces. I say party size because they are bigger than the wilton guide for wedding pieces. This is for a retirement party. Thats why I am wondering if this will be enough. I did find one that is exactly as I am thinking in the graduation gallery it is a 18x24 on the bottom layer & 12x18 on the top layer. She said her servings were for 162. I know that there will be at least 175 there. Yes, the top layer will be on a seperate board & dowel supported.
ty
BellaRosa
Okay ~ I gottcha
Are you calling party-size 2" x 2" slices? Then, yes, it would feed 162.
Bottom Layer:
24 / 2 = 12
18 / 2 = 9
12 x 9 = 108
Top Layer:
12 / 2 = 6
18 / 2 = 9
6 x 9 = 54
108 + 54 = 162
What if you made 2 layers of 11 x 15 side by side on the top? Here's you figures for that:
Bottom Layer = 108 (as above)
Top Layer:
22 / 2 = 11
15 / 2 = 7.5
11 x 7.5 = 82.5
108 + 82 = 190 
THX Steady!! I am just waiting for her to call with the finals tomorrow & I am set. I am going to do the 18x24 on the bottom & 15x22 on the top. I am going to leave a cutting guide there also so the caterers will know what to do. THX again!
BellaRosa
You're very welcome .
What kind of a base do you usually put under a cake that big?
I would typically use a cake drum, but I do not have time to order one & it actually get here by Thursday. So I think I am going to go to one of the hardware stores & get a plank to cover. I will use laminate to cover and then probably the gold or silver cake board paper.
BellaRosa
Have you ever used foam core? They are very sturdy. My cakes use to crack (using cardboard -even when tripled). I have only had a couple of very small cracks since I've been using foam core boards. They're easy to cut and cover.
Hobby Lobby and Michael's sells them. You can find them by the posters and/or framing department. I saw some at Office Depot but they were expensive.
They are similar to the drums only they are not covered. It's like two pieces of posterboard with foam in between them.
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