Preheat oven to 350F (180C).

In a large bowl, combine biscuit mix, parmesan cheese (reserve some for topping), scallions, eggs, and milk.

Mix until just combined; do not overmix.

Pour the dough into a 9x13 inch baking pan and spread evenly.

Flour your hand or spatula to prevent sticking.

Sprinkle the remaining parmesan cheese over the top of the dough.

Use a spatula or knife to score the dough into square biscuits.

Cut all the way to the bottom of the pan to separate the biscuits.

Bake in preheated oven for 40 to 45 minutes, or until golden brown.

Insert a wooden toothpick into the center of a biscuit; it should come out clean when done.

Remove from oven and let cool slightly.

Flip the pan upside down over a rack to release the biscuits.

Flip the rack over to return the biscuits right-side up.