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activity 7: Churning Butter
You will need:
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A glass jar with a screw on lid
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250ml double cream
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A marble
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What to do:
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Place the cream and marble in the jar and close the lid tightly.
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Shake for about ten minutes. You will be able to feel the mixture becoming thicker.
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Drain off the buttermilk leaving a ball of butter. Add salt to taste.
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What is happening?
Double cream has a fat content of about 50%. The fat is present as evenly distributed globules. Shaking the cream ruptures the membranes of these fat globules and causes them to group together forming butter. Adding the salt not only makes the butter tastier but also helps preserve the butter by hindering the growth of micro-organisms. |
