Objectives:
Understand how the chemical structure of fats alters plasticity
Understand shortening
Understand aeration
Tasks:
Write out the glossary terms
Watch the lesson videos
Fill in the gaps
Draw
Justify your drawings
(Stretch & Challenge) Cooking experiment (NEA1 style)
On you glossary page please write out the following terms:
Plasticity – the ability of a fat to soften over a range of temperatures and be shaped and spread with light pressure.
Shortening – the ability of fats to shorten the length of gluten molecules in pastry or other crumbly mixtures.
Emulsion – a mixture of two liquids
Emulsifier – the substance that will allow two immiscible liquids to be held together
Lecithin - is a natural emulsifier found in egg yolk.
Aeration – The ability of some fat to trap lots of air bubbles when beaten together with sugar.
Watch the lesson video part 1:
Fill in the gaps (you can download the sheet from my email/Bromcom/Learning platform or write the paragraphs out in your exercise book):
The plasticity of fat enables us to carry out processes such as spreading raw cake mixture into a tin, piping …………………. onto cakes, spreading cream ………………….. onto crackers, etc. The plasticity of fats is due to the ………………………….. ………………………. . All fats are a mixture of ……………………., containing different ………………….. ……………………… . The triglycerides all have different ……………………… …………………. .
Fats that contain a lot of saturated fatty acids (e.g. butter, l………., s…………, solid c…………… oil and g…………..) tend to be more ………………. at room temperature and therefore have …………… plasticity. The more unsaturated fatty acids a fat contain, the ………….. …………. it is at room temperature and the ……………… plasticity it has.
Watch the video lesson part 2:
Watch the animation:
Draw a shortened mixture:
(here's my example)
Watch the lesson video part 3:
Watch the feedback task video:
Draw a 'water-in-oil' emulsion:
Here's a sentence starter to help you justify your drawing-
'The hydrophillic head is....'
I would like you to email me your drawing and this sentence to kconnett@taptonschool.co.uk by Tuesday 9th June.
I am going to start ringing home if I do not receive your work, in two weeks you have a test so I need to know you are on track to do well.
Watch the video part 4:
Watch the animation:
(Optional) Complete the aeration experiment:
There are many different types of fat available to buy.
Aim: to investigate the effects of using different types of fat to make a basic sponge cake mixture, especially on the ability of the fat to aerate the mixture.
Using the following recipe, make several sample cupcakes using the different types of fat.
Sample A: Block margarine
Sample B: Low fat spread
Sample C: Butter
Sample D: Vegetable oil
Recipe:
Ingredients (for each batch of 6 cupcakes)
50g self-raising flour
50g fat – change depending on which sample
50g caster sugar
1 medium egg
Method – for each batch
1. Pre-heat oven 180⁰C/gas 4.
2. Place sugar and fat into a mixing bowl and cream (beat) together with a wooden spoon until the mixture is light and fluffy.
3. Crack the egg into a jug and beat with a fork.
4. Gradually add the egg to the fat and sugar mixture, beating it as you add.
5. Divide and fold in the flour.
6. Divide the mixture between 6 cup cakes cases in a bun tin.
7. Bake each batch for 12-15mins until risen and set.
Results:
Most of you opted out of live lessons but some of you were interested. As a compromise, I will be available for a face to face (virtual) chat on Monday 12-1 and Wednesday 12-1, I may be available at other times you can always ring to see.
To do this you need to download Teams and ring me, it is really easy! Here's how:
Installing/Setting up Microsoft Teams
PCs/Laptops
Windows Computers - Go to https://products.office.com/en-us/microsoft-teams/download-app and download the Teams app. Once downloaded and install, login the same as you would into the learning platform.
MacBooks – Go to https://products.office.com/en-us/microsoft-teams/download-app and download the Teams app. Once downloaded and install, login the same as you would into the learning platform.
Mobile Devices
Download the Microsoft Teams app and log in with your school email address and password.
Further details:
iOS Devices (Apple iPhones) – Go to the App Store and download Microsoft Teams Once the app has installed login the same as you would into the learning platform. Select OK when asked about notifications and access to your devices microphone, this will allow you to receive notifications when a new message is sent on your Team and you will be able to interact with other users on your Team.
Android Devices (e.g. Samsung, Huawei, etc) – Go to the Play Store and download Microsoft Teams Once the app has installed login the same as you would into SharePoint.
Note. To use Microsoft Teams on a mobile device you will need to first enrol to the Trust security policy by downloading the Microsoft/Intune Company Portal App, you may already have this app installed if you use your school email on your mobile device. The instructions to install the Microsoft Company Portal App and configure will be included with this guide