Heat a skillet over medium heat (or griddle to 300℉) and coat it with butter
In a large mixing bowl, combine the eggs, heavy cream, all purpose flour, brown sugar, salt, ground cinnamon, and vanilla extract. Whisk well.
Slice 4 thick pieces of Challah (or your bread of choice) and dunk each slice into the mixture for a few seconds on each side.
Place each slice in the skillet or on the griddle and cook each slice until they're golden brown on both sides (1-2 minutes per side depending on the heat)
Serve warm with fresh berries, a dusting of powdered sugar, and maple syrup
