Can I use

[sherrardk]

Self-raising flour to thicken the inside of a cottage pie or does it does it have to be plain flour?

[society]

It ok to use self-rising flour, Sherrad.

[merejeans]

potato powder can be good at thickening anything savoury, Smash or such like

[Dee Sa]

I would use a little cornflour or bisto/oxo granules.

[thomski]

to be honest sr flour or plain it wont make any difference but i wouldnt use cornflour as you may find it will leave an unwanted taste corn starch is best if your going down that road

[woofgang]

In the Uk cornflour and corn starch are the same thing