you know in Landon they call Cookie jar as  biscuit jars
In London? That's interesting what else do they say differently ?
it the jar made of tinplate they used to called as biscuit tins
But are biscuits the same as the cookies we eat here in America ?
cookies look small sweet and flat
oooo so not the same, what do they do differently than us ?
it contain sugar, some type of oil or fat
Like butter ?
Butter
Butter is a dairy product with high butterfat content which is solid when chilled and at room temperature in some regions, and liquid when warmed. It is made by churning fresh or fermented cream or milk to separate the butterfat from the buttermilk. It is generally used as a spread on plain or toasted bread products and a condiment on cooked vegetables, as well as in cooking, such as baking, sauce making, and pan frying. Butter consists of butterfat, milk proteins and water, and often added salt.
Cookie jar
Cookie jars are utilitarian or decorative ceramic or glass jars often found in American and Canadian kitchens. In the United Kingdom, they are known as biscuit barrels or biscuit jars. If they are cans made out of tinplate, they are called biscuit tins. While used to store actual cookies or biscuits, they are sometimes employed to store other edible items like candy or dog treats, or non-edible items like currency (in the manner of a piggy bank).
Origin and history.
Cookie jars