Is heat a factor in floppy biscuits?

Question

When you dunk a biscuit in coffee does the fact the coffee is hot contribute to it going floppy? Or is it purely the fact that the buscuit is absorbing moisture?

Answer 1

I can think of two reasons it would make the biscuit go floppy quicker than cold water would. The first is that biscuits have a high fat content and this fat is likely to melt in hot coffee. The second is that solids are disolved in hot water much more quickly than in cold, so any constituents of the biscuits that is soluble in water will disolve more rapidly.

Answer 2

It is purely absorbing moisture. Try dipping the cookie in the glass of water, it should have the same effect. Though I feel the heat might quicken the process of making the cookie floppy.