You will see that I have edited (i.e. reduced) the amount of chilli powder in the recipe (as an option).
The problem is that the piquancy of chilli powder varies so dramtically that it's a little hard to predetermine.

I've had (got) hot chilli powder that knocks your socks of if you use just 1 teaspoons of the stuff. I've also had chilli powder where several teaspoons are needed for a similar piquancy.
It's probably advisable to start off cautiously and subsequently adjust to your own preference.

How much did you use MrC? And how did you find it?
Which of the "options" did you use?