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 Posted By: sweetnsour 
Mar 5  # 1 of 10
Is cornflour the same as cornstarch?
If yes, which one is to be used when?
and also is cornflour white in color or slightly yellowish?
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 Posted By: honeylemon 
Mar 5  # 2 of 10
From what I can understand from the definition in wikipedia. They are one & the same and are used liberally in puddings. Read below:

Cornstarch, or cornflour, is the starch of the maize grain, commonly known as corn. It is also ground from the endosperm, or white heart, of the corn kernel. It has a distinctive appearance and feel when mixed raw with water or milk, giving easily to gentle pressure but resisting sudden pressure. It is usually included as an anti-caking agent in powdered sugar (10X or confectioner's sugar). For this reason, recipes calling for powdered sugar often call for at least light cooking to remove the raw cornstarch taste.
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 Posted By: foodlover 
Mar 5  # 3 of 10
As far as I knew, they aren't the same thing. Corn flour is yellowish and grainy whereas cornstarch is white and a fine powder. I think corn starch is the one used for thickening gravies.
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 Posted By: medako 
Mar 5  # 4 of 10
foodlover - I think you're thinking of cornmeal, which is used in making corn bread.
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 Posted By: Mama Mangia 
Mar 5  # 5 of 10
cornflour and cornstarch are the same thing - cornmeal is made from dried corn kernels - completely different process and product