Questions tagged [chemistry]

Questions about the chemical composition or properties of ingredients and dishes.

Filter by
Sorted by
Tagged with
4
votes
4answers
12k views

PH and sour / acid taste

I had always thought low pH foods had a noticeable sour (acid) taste, and vice-versa. But when reading The Bread Builders by Daniel Wing & Allan Scott, on page 54, it says: The sour taste of ...
4
votes
2answers
1k views

Why my meatballs sweated all of their fat?

I have made simple meatballs with red onions, some eggs, drizzle of olive oil and chopped scallions. Put them into the oven at 220c (440f) and this is what came out: They sweated all of their fat and ...
4
votes
2answers
5k views

What is the difference between a thickener and an emulsifier?

I ask this because I have used a minuscule amount of Xanthan Gum to slightly thicken a chilli sauce I have made. However upon looking at the ingredients of many popular chilli sauces they all tend to ...
4
votes
2answers
214 views

What part of oatmeal cookies are making them soft / chewy?

I'd like to recreate the texture of an oatmeal cookie in very different flavor profiles, ie savory / umami. I'm tinkering with only the rolled oats for now, but I wonder if the chewiness could be ...
4
votes
3answers
262 views

Why does my LN2 evaporate so quickly?

Just made my first attempt at cooking using liquid nitrogen. Decided to start easy, and make a 0.5L batch of ice cream, along with some powdered peanut-butter and banana for toppings. Overall I'd ...
4
votes
1answer
814 views

Why don't other grain proteins behave like gluten?

There are many excellent explanations here (and elsewhere) of what gluten "does." What I haven't seen anywhere is an explanation of what makes gluten so special. Where do its marvelous elastic ...
4
votes
1answer
166 views

Why would parsnips make a beef stock not freeze?

I made a beef stock the way I always do, except that I added parnsips. Then I put the stock in the freezer and when I took it out, the stock was not frozen. It was freezing cold, but instead of having ...
4
votes
1answer
243 views

When you try to “catch” yeast from the air: is it normal for the flour and water to split

I'm trying to "catch" wild yeast for the first time. 36 hours ago I mixed a cup of flour and a cup of water and left it out on a shelf with a paper towel over the top. It's been between 45 and 70 ...
4
votes
2answers
654 views

Food-safe rotary evaporator grease

For those of you who have rotary evaporators or other chemistry glassware in the kitchen, what do you use to grease the ground glass taper/ ball joints so that the lubricant does not either absorb or ...
4
votes
4answers
2k views

Estimating the fat content of homemade chicken foot gelatin

I recently simmered a pot of chicken feet (including skin) for the first time and made an astonishingly gelatinous gelatin. It's clearly suffused with chicken fat, but I have no idea how much -- I don'...
4
votes
2answers
7k views

Adding cold water during cooking of beans and cooking time

After soaking dry beans, I place beans on heat, so they boil for couple of hours, and they cook pretty well. But if I add just one cup of cold water (at room temperature) during boiling, temperature ...
3
votes
3answers
4k views

Create hot “sauce” from capsaicin extract

There are a lot of hot sauces like "Blairs Mega Death" with more than 500.000 scoville heat units. However, they do have some odd taste, which I don't really like. So I'm thinking of creating a sauce ...
3
votes
1answer
1k views

How come mere water buffalo milk and lemon juice mixture turn into yogurt?

Yogurt is produced by the fermentation of lactose in milk by the bacteria of yogurt-ferment. Without those bacteria it is not possible to make yogurt. But surprisingly, water buffalo milk and lemon ...
3
votes
1answer
1k views

What is meant when a spice is water-soluble?

Coriander and basil are said to be water-soluble. However, I'm not quite sure what this means. If you put the leaves into water the leaves do not dissolve. They are still there at the end. I know ...
3
votes
1answer
537 views

What protease is in avocado?

What protease in particular does avocado contain? I've been searching everywhere for it on the internet and still couldn't find any answers.
3
votes
1answer
704 views

Chemical process behind hardening ice cream

We made a simple ice cream by mixing whipping cream, sugar, and Nutella. After 5-6 hours (surely enough time for the ice cream to cool to the temperature of the freezer), it was soft (mechanically ...
3
votes
4answers
7k views

Why does strata have to come to room temperature before baking?

I've made strata a few times before, usually for brunches where I have a number of guests coming over and don't want to spend all my time in the kitchen. I always follow instructions in the recipe; I ...
3
votes
2answers
1k views

Triple cooked chips: Removing moisture by cooling

Triple cooked chips (French fries) are made by: Boiling the chips, then cooling them in the fridge/freezer to remove moisture Deep frying at a low(ish) temperature, then cooling again as above Deep ...
3
votes
2answers
3k views

Why use citric acid and sodium hexametaphosphate in cheese sauce?

I was watching a YouTube video from ChefSteps on how to make cheese sauce. They used sodium citrate and sodium hexametaphosphate. What are the reasons for including these in the recipe? What are the ...
3
votes
1answer
499 views

Vinegar in stock

One day I finished cooking a beef stock. When I poured the stock into a glass bowl and added some vinegar, a cloudy precipitate formed and remained suspended in the stock, leaving it somewhat cloudy. ...
3
votes
2answers
9k views

Differences between gel and gelatine

Are they physically different? If so, what is the difference, between a gel and gelatine, or it's proccesses gelation and gelling (gelatinization. gelatinisation)?
3
votes
1answer
401 views

Preserving Nerds / Pop Rocks so they activate in the mouth and not in the food

I want to be able to use Nerds and/or Pop rocks in cooking. However, unless the food is ultra dry, the food itself activates / dissolves it; I want it activated in the mouth. a) Is there a way to do ...
3
votes
1answer
160 views

How can I avoid getting swindled? How can I detect polyphosphates in fish fillets?

Fish fillets are treated with polyphosphates for several reasons, but mainly to increase their weight (and hence the profit). According to this FAO paper: The first and universal effect of all ...
3
votes
1answer
74 views

How do I salvage this bread dough?

I was planning to make a brioche dough, but somehow managed to measure out and add cornstarch instead of bread flour. I've taken as much of the cornstarch out as I can, but there's about 3/4 cup still ...
3
votes
3answers
7k views

Dissolving Egg Shell

I know that an egg shell is made up of approximately 92% Calcium Carbonate. The remaining percentage of the mass is a protein matrix. I know that vinegar (5% acetic acid) dissolves the Calcium ...
3
votes
1answer
2k views

Why brewed coffee in a pot needs a lid?

Coffee in an electric drip brewer (a model like this) goes all murky brown and opaque very fast, when the pot is left without a lid. With lid, it stays translucent and bright dark brown for quite a ...
3
votes
0answers
648 views

Eggless choux pastry recipe yields paper-thin top, gooey bottom

I'm trying to make eggless choux pastries for an egg-allergic friend (my eventual targets are croques-en-bouche and saint-honorés). I have experience with choux pastry, but I've never made an eggless ...
3
votes
1answer
101 views

Physics/chemistry behind the observation

This is purely observation based. Any time I have cooking something on the stove, if I change intensity in any direction - reducing or increasing the heat, it seems like water vapor threads shoot out ...
2
votes
2answers
124 views

How to bake baking soda to produce sodium carbonate?

I'd like to make sodium carbonate for ramen noodles. The instructions on the web however vary greatly. One source says to bake baking soda at 350 degrees for 2-5 hours. Others say 250 degrees for an ...
2
votes
2answers
6k views

Aiding the Maillard reaction: Baking Powder or Baking Soda?

I will attempt to cook a Thai Green Chicken Curry. I'll be using cubed boneless chicken thigh which I would like to brown really well. I remember reading somewhere that Baking Powder or Baking Soda ...
2
votes
2answers
349 views

Pitaya Red Velvet Cake became brown

Starting point: I was trying to follow a red velvet cake recipe from the internet, but since I always try to replace industrial/artificial ingredients by more "natural" ones (just out of curiosity), ...
2
votes
1answer
135 views

Does pasta boiled in tap water absorb chemicals?

Apparently chlorine goes with boiling but I'm not sure if this is true. However I know that chloramines also exists in tap water and concentrate more with boiling. Will the chloramines absorb into ...
2
votes
3answers
2k views

What chemical(s) gives molasses its flavor so that it is used as an ingredient?

I'm curious why there isn't a zero-calorie molasses substitute. The USDA nutrient database lists a bunch of minerals, but what is it that gives it the "taste" of molasses?
2
votes
3answers
3k views

Chemical meat tenderizers

I know pineapple (Hawaiian cooking), onion (Chaliapin steak), pickle juice (Chick-fil-A) and honey (Shokugeki no Soma). All tenderize meat via cooking and / or marinating. My questions are: What ...
2
votes
2answers
60 views

Is there a comprehensive overview of food colors?

I found a small list of food additives compiled by the FDA, but it looks rather incomplete and somewhat unspecific. For example, some colors like gold (probably the real thing) or silver (E171 - ...
2
votes
2answers
4k views

Why should I add salt to my curries?

I've been advised by a friend of mine that I have to add salt to my curries if I want the spices to come out and not leave me with a bland curry. Now after being a doubter, as I never add salt to my ...
2
votes
1answer
2k views

How to make hard candy with only fruit as a sweetener

I have a child with a restricted diet that can have no added sugar or other form of sweetener, with the exception of fruit juice. He is in desperate need of cough drops or throat lozenges, but I find ...
2
votes
1answer
170 views

Why should milk boil to the rim?

In some cases hot milk is needed. My example is a ready made mixture for milk rice. The direction says I should heat the milk until it shows foam raising, which often raises up to the rim (or more). I ...
2
votes
1answer
375 views

Flavor and Chemical Composition of Thyme

What is the flavor of Thyme? What chemicals give it this flavor?
2
votes
1answer
133 views

Can flavoring extracts be added to inverted sugar?

I'd like to try doing a recipe with inverted sugar (hand pulled cotton candy), but am entirely new to candy making. I have the instructions to create inverted sugar, but would like to add a flavoring (...
2
votes
2answers
1k views

How can I get a syrupy “mouth-feel” in sugar-free syrup?

I viscerally hate low calorie sugar replacements - all of them, including Splenda (sucralose), except in one application. In my iced coffee I like sugar-free hazelnut syrup. The brand that I've been ...
2
votes
2answers
4k views

How to make Menthol crystal from mint leaves? [duplicate]

I have peppermint/mint growing in my garden backyard. I want to make mint candies for children and in one of the YouTube videos they have menthol crystal as one of the ingredients for mint candies so ...
2
votes
1answer
120 views

How to make creamy/starchy risotto with brown rice?

I've been making risotto with a brown rice blend (Long Grain Brown Rice, Sweet Brown Rice, Wild Rice, Whole Grain Wehani Rice, Whole Grain Black Japonica Rice), and I quite like the texture, and how ...
2
votes
2answers
163 views

Technical reasons against chocolate-coated shortbread

It is possible to find chocolate-coated shortbread (as in, the Scottish biscuit made of flour, sugar and butter, coated with chocolate) as a product in the UK, but it's very rare. Chocolate-coated ...
2
votes
1answer
270 views

Can bananas really be ripened through oven baking?

I am following a diet for IBS called the Specific Carbohydrate Diet (SCD). Only bananas that are ripe, i.e. well spotted, can be consumed. Green and non-spotty can not be due to a difference in ...
2
votes
1answer
293 views

Separating Chlorophyll didn't work

I tried to extract chlorophyll from spinach by blending up some spinach and water and straining out the green juice, then heating the juice. I've done it before, but this time, it wouldn't separate. ...
2
votes
0answers
38 views

How does the viscosity of honey affect bread machine results?

The first time that I used this blueberry oatmeal bread machine recipe, I used honey that was liquid at room temperature. The second time, I used honey that was solid at room temperature. In order to ...
2
votes
0answers
409 views

Emulsifying homemade coconut milk? [duplicate]

I've been experimenting with fresh coconuts lately (they are amazing), but one thing I haven't figured out yet is how to make a nice creamy coconut milk. Mainly to make hot chocolate and eat with ...
2
votes
0answers
69 views

Can you alter nutritional properties of beans and other ingredients using diastatic malt?

I was reading about brewers' spent grain the other day and its nutritional profile (high protein and fiber content, no carbs) and how it's obtained. Would something similar be possible with beans and ...
2
votes
0answers
27 views

Dry aging at home - is it really possible? [duplicate]

I am thinking to test the process of dry aging at home. I have some questions: What exactly are the processes a piece of meat experiences, in this case, beef, from the time it is slaughtered to the ...