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 Post subject: Can someone do this math for me?
PostPosted: Fri Mar 15, 2013 10:18 am 
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Venomous Head of Veganism
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OK so I usually do cheesecakes in a 9-inch round pan. I want to make a bunch of samples for something, and so I want to double the recipe and put it in a 9x13 rectangle pan. Should I, in fact, only 1 1/2 the recipe or should I double it? "Math is hard." ~ Barbie

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 Post subject: Re: Can someone do this math for me?
PostPosted: Fri Mar 15, 2013 10:21 am 
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 Post subject: Re: Can someone do this math for me?
PostPosted: Fri Mar 15, 2013 10:22 am 
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Not NOT A Furry
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1.83912378684

Better double it.


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 Post subject: Re: Can someone do this math for me?
PostPosted: Fri Mar 15, 2013 10:25 am 
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IsaChandra wrote:
"Math is hard." ~ Barbie


Let's go shopping.


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 Post subject: Re: Can someone do this math for me?
PostPosted: Fri Mar 15, 2013 10:26 am 
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Chip Strong
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Area of a circle is pi x radius squared, so the area of your round tin is about 63 cm squared.
Area of a rectangle is length x width, so the area of your rectangle tin is about 117 cm squared
Therefore, you should double it because the area of the rectangle is almost double that of the circle.

I hope that makes sense :)

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 Post subject: Re: Can someone do this math for me?
PostPosted: Fri Mar 15, 2013 10:29 am 
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I'm going to show this thread to my kid and make him appreciate math class.

(also my head hurts from this and I want cheesecake.)

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 Post subject: Re: Can someone do this math for me?
PostPosted: Fri Mar 15, 2013 10:34 am 
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I think we all deserve cheesecake for thinking about math....

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 Post subject: Re: Can someone do this math for me?
PostPosted: Fri Mar 15, 2013 10:37 am 
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Imogen wrote:
Area of a circle is pi x radius squared, so the area of your round tin is about 63 cm squared.
Area of a rectangle is length x width, so the area of your rectangle tin is about 117 cm squared
Therefore, you should double it because the area of the rectangle is almost double that of the circle.

I hope that makes sense :)

The first three sentences are just a shining flashing orb? Then it says "I hope that makes sense :)"

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 Post subject: Re: Can someone do this math for me?
PostPosted: Fri Mar 15, 2013 10:37 am 
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Just compare the areas if you're sure the pans are the same depth (or you're pouring in batter to the same depth). But if they're different depths, compare the volumes - use the area equations Imogen gave and multiply each of them by the height/depth of the pan. But really - it's hard to increase recipes by fractions, much easier to just double, and then if you have leftovers you can make yourself a mini cheesecake in a ramekin.

ETA: The other thing that could make this complicated for other kinds of cakes is rising. Cakes seem to rise differently in different pans (I guess because of how well they can cling to the sides?), so you could wind up with a flatter cake in a bigger container even if you increased the volume of the batter appropriately. I think with cheesecake it shouldn't matter, though.


Last edited by Ariann on Fri Mar 15, 2013 10:38 am, edited 1 time in total.

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 Post subject: Re: Can someone do this math for me?
PostPosted: Fri Mar 15, 2013 10:38 am 
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rhelune wrote:
1.83912378684

Better double it.

That's what I thought! (not the top sentence, which looks like some sort of ancient fire dance? But the part about doubling it.)

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 Post subject: Re: Can someone do this math for me?
PostPosted: Fri Mar 15, 2013 10:40 am 
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Ariann wrote:
Just compare the areas if you're sure the pans are the same depth (or you're pouring in batter to the same depth). But if they're different depths, compare the volumes - use the area equations Imogen gave and multiply each of them by the height/depth of the pan. But really - it's hard to increase recipes by fractions, much easier to just double, and then if you have leftovers you can make yourself a mini cheesecake in a ramekin.

ETA: The other thing that could make this complicated for other kinds of cakes is rising. Cakes seem to rise differently in different pans (I guess because of how well they can cling to the sides?), so you could wind up with a flatter cake in a bigger container even if you increased the volume of the batter appropriately. I think with cheesecake it shouldn't matter, though.

Well, I don't need advice on how to bake. Just on how to do math. It looks like a few words in your first paragraph are totally blacked out, and if I try to touch them on my screen, something bites!

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 Post subject: Re: Can someone do this math for me?
PostPosted: Fri Mar 15, 2013 10:42 am 
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What you can do is just pour water into the pans and then pour the water into a measuring bowl and then you can just keep right on living in a world without meaning, sense, or beauty.

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 Post subject: Re: Can someone do this math for me?
PostPosted: Fri Mar 15, 2013 10:44 am 
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mumbles wrote:
What you can do is just pour water into the pans and then pour the water into a measuring bowl and then you can just keep right on living in a world without meaning, sense, or beauty.

Now we're talkin.

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 Post subject: Re: Can someone do this math for me?
PostPosted: Fri Mar 15, 2013 10:45 am 
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Mumbles is wise.

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 Post subject: Re: Can someone do this math for me?
PostPosted: Fri Mar 15, 2013 10:47 am 
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mumbles wrote:
What you can do is just pour water into the pans and then pour the water into a measuring bowl and then you can just keep right on living in a world without meaning, sense, or beauty.

And add a rubber duckie! And let his plasticness float aimlesslessly on these sad, shallow ponds forevahmore.

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 Post subject: Re: Can someone do this math for me?
PostPosted: Fri Mar 15, 2013 10:53 am 
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Additional mini cheesecake is a great idea. For double recipe you can use the 9*13 pan plus a 3.5 inch ramekin.


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 Post subject: Re: Can someone do this math for me?
PostPosted: Fri Mar 15, 2013 10:54 am 
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make mini cheesecakes! fox run cookie cutters are the perfect size to cut a graham cracker circle. (you can get 5 per cracker)

the shallower and wider mini cupcake pans make a more enjoyable bite than the traditionally shaped mini pans.

you can do the water bath in a jelly roll pan. (but to prevent spillage into the cupcake wells, put the pan of water in the oven first and then the cupcake pan.
the only issue is finding the right sized mini cupcake papers. i found them only once, at a kosher supermatket, and they were dyed bright colors that ran into my cheesecakes. it was pretty gross, actually.

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 Post subject: Re: Can someone do this math for me?
PostPosted: Fri Mar 15, 2013 11:21 am 
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Yesterday was Pie/Pi Day. Today is Cheesecake Math Day.


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 Post subject: Re: Can someone do this math for me?
PostPosted: Fri Mar 15, 2013 11:51 am 
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IsaChandra wrote:
Well, I don't need advice on how to bake.


Well, obviously, but I find the rising issue to be a problem when converting between cake sizes, even following printed recipe directions for how to do so - the cakes obviously don't turn out with the same rise/mounding. Back when I ate my mother's dairy cheesecakes, I recall some unfortunate cake cave-ins that happened because of using a bigger than normal vessel. I don't know if the same problem translates to vegan cheesecakes, though. Baking is not my specialty.

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Just on how to do math. It looks like a few words in your first paragraph are totally blacked out, and if I try to touch them on my screen, something bites!


haha


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 Post subject: Re: Can someone do this math for me?
PostPosted: Sat Mar 16, 2013 6:14 pm 
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Chip Strong
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mumbles wrote:
What you can do is just pour water into the pans and then pour the water into a measuring bowl and then you can just keep right on living in a world without meaning, sense, or beauty.


That would tell you the volume of the entire pan (useful if you knew you wanted to fill them exactly to the brim) but not the area of the base of the pan, which is what I assumed you were asking for ...

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 Post subject: Re: Can someone do this math for me?
PostPosted: Sun Mar 17, 2013 3:41 am 
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Mmmmmmmmmmmath

I need to take you to get some Montessori learnin'

See how Pi is the ratio of the circumference over the diameter!

Image

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 Post subject: Re: Can someone do this math for me?
PostPosted: Sun Mar 17, 2013 4:00 am 
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 Post subject: Re: Can someone do this math for me?
PostPosted: Sat Jun 08, 2013 11:01 am 
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YOOU GUYS. I needed this thread again!

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 Post subject: Re: Can someone do this math for me?
PostPosted: Sat Jun 08, 2013 11:31 am 
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Ask away.

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 Post subject: Re: Can someone do this math for me?
PostPosted: Sat Jun 08, 2013 12:51 pm 
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IsaChandra wrote:
Well, I don't need advice on how to bake. Just on how to do math.


Whereas I don't need advice on math but do need it for baking (and all cooking, frankly), so you should come here and ask your math questions and I will follow your recipes to make delicious things.


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