Biscuit Recipe Test - Adding an Egg to Biscuit Dough

SOURCE: https://food52.com/blog/18794-this-test-might-convince-you-to-add-an-egg-to-biscuit-dough

I am neither a Southerner nor a biscuit analyst, yet this Instagram from Tom Hirschfeld gave even me pause: an egg in biscuit dough?! Is this proper?

(Spoiler alert: I couldn"t determine. view full post