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Questions tagged [chemistry]

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

2
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0answers
20 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 ...
5
votes
1answer
100 views

Chemistry of maple butter

I've recently tried to make maple butter with the following recipe: Heat maple syrup to about 110 - 115°C Cool to about 20°C (by putting the pot in an ice/water bath) Stir manually for 20-30mins I ...
1
vote
1answer
133 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 ...
3
votes
1answer
89 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
1answer
84 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
1answer
122 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 ...
30
votes
2answers
4k views

Why do shrimp / lobster / crab turn pink or red when cooking?

Cooking is a form of chemistry - so there must be a scientific reason behind this. Why do all crustaceans turn pink or red when cooked?
2
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0answers
70 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 ...
1
vote
1answer
152 views

Eating with silvered cutlery

I have a set of silvered cutlery with which i often eat. I recently heard that the handles of a lot of older silvered cutlery is filled with lead or they are even made out lead. Am i safe to eat with ...
2
votes
2answers
171 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), ...
0
votes
1answer
110 views

What is the maximum allowed temperature to cook onions saving the fructooligosaccharides?

Onions are a great source of fructooligosaccharides that are a natural prebiotic that beneficial bacteria of our gut microbiome feed on. Having read about this I have started eating raw onions but ...
16
votes
1answer
2k views

Why does my banana bread have a moist top?

My mother always made banana bread when I was growing up, and my favorite part was the the fact that the top of the loaf was sweet and moist, to the point that it would leave residue if you touched it!...
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vote
0answers
42 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 ...
7
votes
2answers
142 views

“For optimal flavor, open the package 30 minutes before eating” - only temperature or also chemistry?

Packages of ham or smoked fish sometimes have a hint like the one I quoted in the title. They are usually stored in the fridge, so one part of the reason to take it out of the fridge and open it ...
-1
votes
1answer
181 views

What edible solution can I use cover biscuits to make it waterproof and stronger?

I want to make hard biscuits like teething biscuits Now the biscuits which I have made is not so strong and observes moisture quickly I use all purpose flour, a little baking powder,oil , a little ...
3
votes
1answer
390 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 ...
2
votes
3answers
975 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 ...
0
votes
0answers
24 views

Leaving sauces to sit [duplicate]

Yesterday I made a pasta sauce that I make regularly. However, as I knew I would be busy in the evening, to save time, I made the base sauce -- olive oil, garlic, plum tomatoes, roasted peppers, ...
0
votes
3answers
318 views

Is salty tongue effect normal after eating sichuan peppercorns?

I've used sichuan peppercorns many times previously and never had this effect before where my tongue becomes salty for a while after eating it. Normally I would just get the buzzy, numbing effect but ...
3
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1answer
493 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.
0
votes
1answer
88 views

Dried fruit and calcium levels [closed]

My daughter suffers from lactose intolerance and/or milk protein allergy (this has yet to be confirmed by a paediatrician due to the way the NHS works in the UK). I tend to bake fruit cakes and mix ...
1
vote
1answer
127 views

Why does the crust of a freshly baked loaf of bread become less crunchy/hard over time?

Something I noticed - I bought fresh bread today from a Polish bakery/deli. It was still warm when I bought it, so it probably just came out of the oven. When I got home and tried it, it was amazing. ...
2
votes
1answer
80 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 (...
51
votes
2answers
13k views

Why drain soaked rice?

When cooking black rice, I’ve been told I need to soak it for a few hours, then drain and finally cook with 1:3 parts regular rice (i.e., topped up with fresh water). Black rice is a type of ...
2
votes
2answers
2k 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 ...
9
votes
2answers
980 views

How does sunlight degrade cooking oil?

Why exactly is it recommended to store cooking oil away from sunlight? How does sunlight accelerate spoilage?
6
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2answers
2k views

How can I extract menthol powder from fresh mint/peppermint?

I have peppermint/mint growing in my garden backyard. I want to make Ice Cream for children and they are asking for some flavour paan ice cream in Hindi (mint ice cream) and for that I want Menthol ...
5
votes
1answer
910 views

Does cumin contain curcumin? If not, where does the name come from?

According to Wikipedia, curcumin was originally isolated from tumeric. However, I haven't been able to find why it was named curcumin or whether or not it cumin is currently known to contain it.
2
votes
0answers
66 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 ...
7
votes
1answer
840 views

How to calculate the pH of a lye solution?

I'm trying to figure out if I can substitute the catholyte from a salt water electrolysis system for a lye solution in pretzel making. In order to figure this out, I need to know the pH of my lye ...
4
votes
2answers
882 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 ...
5
votes
2answers
372 views

Why did my green tea muffins turn black?

I made green tea muffins following the recipe here. I like my muffins moist and fluffy, so I added banana as suggested by the recipe and replaced half of the baking powder with baking soda. I also ...
10
votes
3answers
2k views

Does mayo “break”/decompose if you stop whisking then whisk the other way?

Is is true or an urban legend that if you whisk the opposite way while making mayonnaise (after you've whisked in one direction for a while), the mixture will be "undone" into its components?
9
votes
2answers
6k views

What is the film on top of tea?

The quiet surface of a cup of tea always seems to be covered by a thin, immovable film, even when convection currents are still moving things around inside the liquid at some speed. The surface ...
1
vote
1answer
217 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 ...
14
votes
1answer
1k views

Does sputtering butter mean that water is present?

When I place a pat of butter in a hot pan, the butter melts and begins to sputter and steam. Then steam bubbles pop which sends tiny grease drops flying out of the pan. This happens consistently ...
-3
votes
1answer
264 views

Can one use cooked egg to make fried eggs (sunny side up)? [duplicate]

As a kid, I never really liked cooked eggs, but fried ones. Naturally, I've always wondered if cooked eggs could be reused to make fried eggs with sunny side up instead of using new raw ones. I ...
33
votes
7answers
13k views

Can one bake a cake with a cooked egg instead of a raw one?

This recent question about a person who wanted to bake a cake but only had a cooked egg left suggested me an even stupider one: is it possible to bake a cake with a cooked egg instead of a raw one? ...
6
votes
2answers
2k views

How to sweeten bread without sugar

I know that sugar molecules are large and too many of them can prevent a proper gluten network from forming when making bread. What other things can be used to sweeten bread instead of sugar? I'm ...
4
votes
3answers
191 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 ...
5
votes
3answers
3k views

How does the meat in Weisswurst get so white?

I have looked for the answer online, but no luck so far. Does the ice "burn" the meat and it gets white? How does it work?
14
votes
3answers
15k views

Does chlorine evaporate from water when cooking?

Most municipal water supplies in the U.S. include noticeable levels of chlorine or chloramine added to kill microbes, and often adds an objectionable chemical smell. Does chlorine evaporate when ...
4
votes
1answer
626 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 ...
0
votes
1answer
104 views

How do I measure the ripeness of my tomatoes?

In my quest for a perfect shakeshouka (eggs in poultry) I figured out I need less acidity in the dish, and have read that acidity in tomatoes varies widely. I have read that very ripe tomatoes have ...
1
vote
1answer
154 views

preparing lupini beans?

Lupini beans are an ancient and delicious snack food widely consumed around the Mediterranean and elsewhere. But they naturally contain high levels of toxic alkaloids, so they require special ...
1
vote
0answers
96 views

Storing Transglutaminase once opened

I have a sealed packet of Transglutaminase/Activa powder. However its much more than I need for this recipe. I know it deactivates quickly after being exposed to air. Whats the best way to store it ...
10
votes
2answers
1k views

Why do we dimple a focaccia?

When I was making a focaccia earlier today, I realised that I've never been told why we dimple them before baking. A quick Googling didn't reveal anything, so I'm asking here: why do we make dimples ...
2
votes
1answer
1k 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 ...
0
votes
2answers
263 views

Does cooking vegetables increase their flavor?

Is there some scientific explanation for why one cooks vegetables? I mean apart from increasing the ability to digest. Are there flavor enhancements going on? Does the temperature have to rise about ...
1
vote
2answers
1k views

Baking soda for soaking chickpeas [duplicate]

This source claims that adding baking soda is crucial when soaking chickpeas. Is this true, and if so, what is the reason that this works?