W-what do we do...

O-oneesama, there were more eggs over here

How about we weigh the amount of necessary cake flour from the original bowl... 薄力粉 is "weak flour", or basically cake flour or low gluten flour. See "Wiki":https://en.wikipedia.org/wiki/Wheat_flour#Flour_strength_.E2.80.93_W_index for information on flour strength.

and then add the eggs together with it into a new bowl

Shi...Shiro-chan, you're a genius!

I got praised...

Alright...from here on out, we shall commence the Great Flour Rescue Mission!!

Onee-sama, you're so cool