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| Cupcakes for my Lil' Guy |
My very first post was about Cake Ratios and it's still my most popular post...
Here I share how I "spot check” a recipe to see
if it's sensible before I start...
I've focused on a recipe that is the
first one I learned to make from scratch when I learned how to bake
about 20 years ago.
Recently, I made it for my son's birthday and
realized it's a perfect example because of the short list of
ingredients and volumes that are easy to convert to weights.
2 1/4 cups all-purpose flour
1 1/2 cups sugar
1/2 cup butter
1 1/4 cups milk
3 1/2 tsp. baking powder
1 tsp. salt
1 tsp. vanilla extract
3 large eggs
Step 1: Convert Cups to Ounces
Baking can seem tricky because it
depends specific reactions for success... so reading one can feel
like a Test question: “Eight ingredients are riding on a bus...
which ingredients get window seats?”
Wait... What? Don't panic. Like
Standardized test questions, there IS a trick... baking reactions are
really dependent on weights - not volumes.
So the first step is to convert those
amounts into weights. Change the fractions into a decimal format (½
cup = 0.5 cup etc.). Then multiply by the ounces below to get numbers
that are easy to compare. Only convert ingredients that are measured
in cups, plus eggs. I Don't worry about converting amounts for
teaspoon sized ingredients: salt, baking soda, baking powder, or
flavor extracts.
Conversion Factors
All Purpose Flour is ~ 4 oz per cup
White Granulated Sugar is ~ 7 oz per cup
Butter is 4 oz per stick (½ cup)
Large Eggs are ~ 1.75 ounces each
Milk is 8 oz ~ per cup
Math for Starlight Yellow Cake
2.25 cups of FLOUR x 4 oz per cup = 9
oz flour
1.5 cups of SUGAR x 7 oz per cup = 10.5
oz sugar
½ cup BUTTER (1 stick) = 4 oz
3 large EGGS x 1.75 oz each = 5.25 oz
egg
1.25 cups MILK x 8 oz per cup = 10 oz
milk
Step 2: Compare Weights
Butter Cakes work when four factors are
in a certain balance. If you get more than 20% outside these
parameters the result may not turn out as cake. Too far out of ratio
and you are making a different thing all together (birthday tortilla
anyone?)
Does a recipe make a birthday cake?
FOUR BIG CAKE QUESTIONS:
Q1: Is there slightly more SUGAR than
FLOUR?
Q2: Is there slightly more EGG than
FAT?
Q3: Is there slightly more LIQUID than
SUGAR?
Q4: Is there enough LEAVENING for the
FLOUR?
Starlight Yellow Cake Recipe (in ounces)
9 oz FLOUR
10.5 oz SUGAR
4 oz BUTTER
5.25 oz EGG
10 oz MILK
3.5 tsp BAKING POWDER
1 tsp. SALT
1 tsp. VANILLA EXTRACT
Note: Typical LEAVENING is 1 teaspoon
BAKING POWDER per cup of flour - OR ¼ teaspoon BAKING SODA per cup
of flour. Some recipes may include both.
Also note that the LIQUID includes the
volume of eggs plus milk, and/or water COMBINED. If a recipe lists
one or more tablespoons of liquid flavorings (coffee, liquor, etc),
they should be included in the liquid weights too.
FOUR BIG ANSWERS for Starlight Yellow Cake
A1: YES, there is more Sugar (10.5 oz)
than Flour (9 oz)
A2: YES, there is more Egg (5.25 oz)
than Butter (4 oz)
A3: YES, there is more Liquid (10 oz +
5.25 oz) than Sugar (10.5 oz)
A4: YES, there is enough Leavening for
the Flour (3.5 tsp vs. 2 cups)
Step 3: Flavor
The question “Chocolate or Vanilla?”
might be your first thought when planning a menu - but it shouldn't
be the deciding factor in picking WHICH recipe to follow. Make sure
you actually have a butter cake recipe first!
Even a great brownie, muffin, torte, or
soufflé will be disappointing if you wanted cake!
After the Four Big Cake Questions,
think about flavor - is there enough included? A typical cake recipe
calls for 1 teaspoon of salt and 1 teaspoon of flavor extract. This
Starlight Yellow Cake could easily be made into a lemon cake just by
changing the extract.
Without extract, the main flavor would be egg
yoke (think egg bagel etc). Modern recipes may limit the salt to
improve the nutritional stats of their food on paper, it usually
doesn't do the flavor any favors. Trust me, when you get a cake from
the bakery, it has salt in it.
Substitutions = Fall from Grace?
Substitutions are hazardous in baking
more than cooking because tweaking one ingredient can easily cause a
cascade of changes that hurt the recipe. For example:
Butter is about 80% fat, if margarine
with 60% fat is used instead, the effective fat ratio drops by about
20 percent, so 4 oz would act more like 3 oz. Since fat is critical
for physical leavening and it limits gluten formation, the end result
would be lower and tougher than ideal. If you also used less
margarine than the recipe calls for the cake falls into the danger
zone. Don't forget the the fat in margarine is replaced with water,
so the batter may be soggy and look under-baked when all the other
structural changes should really be complete.
A working recipe can also be pulled out
of whack accidentally by flavor ingredients. For example: Cocoa
powder is dry and powerfully bitter. To balance the bitterness
additional sugar is needed to make a chocolate cake taste equally
sweet as a vanilla cake. The powder will also soak up some of the
liquid without adding to structure the way flour does. You could add
more eggs... but the batter will still be a bit drier and might need
to be spread into the pan...
... and just like that, you've stumbled
into brownie territory!
Back to the Starlight Yellow Cake...
(In theory) this recipe could be tweaked with up to 4.75 more ounces
of sugar before it fell out of ratio. Basically this is a wiggle room
of about ½ cup of sugar. (Math! 15.25 ounces of liquid [egg +
milk], minus 10.5 ounces of sugar = 4.75 ounces.)
The end result is that SUGAR balance is
the limiting factor in how chocolate-ly the Starlight Yellow Cake
could get before hitting trouble. I.e. It might work to add 2
tablespoons of cocoa powder and add ¼ cup of extra sugar to balance
it out... (there is enough liquid to cover it). But if you wanted to use 1 cup of cocoa powder, then add 2
cups extra sugar, other changes would be needed.
Each change has it's own consequence.
Adding extra leavening could make the batter bitter or soapy. Extra
sugar could be used to reduce gluten formation but puts the cake at
risk for over-browning, plus it may require additional liquid... and
so on...
Now you can see why there are thousands
of recipes for cake... Hopefully this post makes it easier to spot good basic ones!
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