The trick: folding in a small tsunami of beaten egg whites to give the batter foamy body.

WSJ: Waffle Recipes: Off the Grid | Breakfast 2.0

Brush the tops of the biscuits with the beaten egg... coat well and evenly over the top.

NPR: Red, White and Blue Desserts

After dipping the turkey in the beaten egg and crumbs, but before cooking, allow the cutlets a few minutes' repose to let the breading fully adhere to the meat.

WSJ: Marc Vetri's Turkey Milanese | Slow Food Fast