Need help with a recipe. increasing to fit size of pan
By suspenseful
@suspenseful (40192)
Canada
September 25, 2008 10:09am CST
I have a raisin square recipe that is made for an 8 x 8 inch square pan, and I want to increase it to fit a 9 x 9 inch square pan, because it is for our Women's Society and there will be about twenty there and I also want to make some for my husband as well. Now I am not that good at math, and I do not want to take a chance of estimating, so how much percentage would I have to increase it.
It has 1/2 c each of brown sugar, and water, 1/4 cup each of butter, 1 cup each of raisins, and all-purpose flour, 1 tsp each of cinnamon, and baking powder, 1/4 tsp each of nutmeg, and cloves, 1/2 tsp each of salt and baking soda and 2 tsp; of water.
and the icing is 1 1/2 c of icing sugar, 3 tbsp of butter, and 5 tsp of lemon juice.
So that will give you an idea.
Thanks for your help.
5 people like this
6 responses
@LouiseKnittel (4764)
• United States
25 Sep 08
Sorry that I really do not know the answer. One sight that I know that lets you increase the recipe is: www.allrecipes.com
maybe that sight can be helpful. if not, you could always just make 2 of the 8x8's
3 people like this
@suspenseful (40192)
• Canada
26 Sep 08
I have used Allrecipes, but this is not an Allrecipe recipe. I got this from a book I had. I did make two of them so I guess my husband and I will have to finish it off, and I will have to hide it so I do not do any snacking. I will have to put it into the freezer though. Because it is so tempting. 
@doubleloveyou (2466)
• United States
25 Sep 08
Well you have to calculate based on a constant thickness otherwise it may not cook correctly. So you will be going from an 8x8x1 to a 9x9x1. Calculate the volume and you get 64 cubic inches for the 8x8 and 81 cubic inches for the 9x9. Now calcualte the percentage difference. 81 divided by 64 = 126.5625%
So you have a difference of approx 26.5%. Now that percentage can be rounded up to 30% without making a difference. You may just want to check it from time to time to ensure it is cooking properly.
Based on that information increase all your portions by 25%
1/2 cup becomes 2/3 cup
1/4 cup becomes 1/3 cup
1 cup becomes 1 1/3 cup
1 tsp becomes 1 1/3 tsp
1/4 tsp becomes 1/3 tsp
1/2 tsp becomes 2/3 tsp
2 tsp becomes 2 2/3 tsp
On the icing you may have enough icing for the cake even with the extra cake size but if you wanted to increase that porportionally it would be:
1 1/2 cup becomes 2 cups
3 tbsp becomes 4 tbsp
5 tsp becomes 6 1/2 tsp
Hope this helps
2 people like this
@doubleloveyou (2466)
• United States
25 Sep 08
I guess I am too much of a geek. 
I did terrible in School. I didn't start understanding it until I was out of school. Go figure. Now I'm an engineer. :-)
I did terrible in School. I didn't start understanding it until I was out of school. Go figure. Now I'm an engineer. :-)3 people like this
@doubleloveyou (2466)
• United States
25 Sep 08
Note: the thinkness of the cake I used 1 inch, but it would not make a difference. The percentage is the same whether it was 1 or 1/2 or 5 inches high.
3 people like this
@suspenseful (40192)
• Canada
27 Sep 08
Apparently they need one third extra of each ingredient to make it up to a 9 x 9 square pan.
@suspenseful (40192)
• Canada
30 Sep 08
You're welcome. I find that an 8 x8 pan is not large enough, and a 9 x13 pan is too large, so I would rather use the 9 x9 pan size and get it so I can bake for my
Women's Society and have enough for my husband at home. We have to watch our weight.
@ANTIQUELADY (36440)
• United States
26 Sep 08
i would just double the recipe & if that was too much for the larger pan bake what's left in a smaller pan & if your family want eat it just freeze it till u get hungry for it.
@suspenseful (40192)
• Canada
26 Sep 08
I did make double and then someone here who is good at physics showed me how to increase it to fit the 9 x9 pans. I guess they are not making them more here in Canada. I had to get my 9 x9 pans at Value Village or import them from the States. 8 x8 translates into metric. So now everything is all right.
1 person likes this
@rocketj1 (6955)
• United States
25 Sep 08
Most recipes double easily with the same results as the original. But this is not true of all recipes. I would double the recipe and use a 9x12 or 9x13 pan. You may have to bake it a little longer so check on it quite often. Changing from a 8x8 to a 9x9 could get complicated. Also if you put it in the 9x9 using the original recipe, you may get more servings, just thinner ones.
1 person likes this
@suspenseful (40192)
• Canada
25 Sep 08
The recipe is thin as it is. It is a Canadian recipe and the lady who made it made sure that you really had to scrape to get things in. I think she is quite stingy with some recipes.
2 people like this
