Red Chevy --- as far as toppings to use think to each his own. My wife uses powdered sugar. My son uses Apple butter. My daughter uses syrup.....
Snake Wrangler--- in a 10 inch skillet last night using 6 eggs the Dutch Baby was about 1.75 to 2 inches thick after collapsing. The pancake collapes a bit as it cools.
Last night I did not take a plated view. I was too busy eating...... My bad. The link in the original post show a cut side view.
PMK---it sounds like your mother made a frittata. Instead of adding savory items like sausage and potatoes the addition of cinnamon and vanilla made the Dutch Baby more like a desert.
The link below provides some basic frittata ideas as well as some ideas on what to add to the dish. My favorite frittata is cheese, cooked sausage, cooked hashbrowns/diced potatoes, and onions that have been cooked a bit in my skillet. I top everything with a good salsa or home made rancheros sauce.https://www.epicurious.com/expert-advice/ultimate-easy-frittata-recipe-article