Another failed attempt

Tried to make another batch of Kueh Bahulu yesterday evening.
But then got almost the same result.
The interior is very spongy & kinda hard.
The crust is only crispy only straight out from oven.
After it cooled down, the crispy crust is gone.
I seriously think there's some problem with my whisking of the eggs & sugar.

Some receipe have mentioned not to over-mixed.
While i only mix on med-high for 10mins as stated on the receipe.
I'm beginning to think that the PH auntie maybe right..
Maybe i shld consider adding some sago flour to my bahulu.
So that the inside will be soft.

I wanted to try another receipe from here next time.
Hopefully it'll turn out right.
It's stated that we shld fry/bake the flour also.
Maybe thats the secrect.