In a bowl big enough to accomodate the width and height of your bread, pour the milk & cream.
Add the sugar and mix to combine.
Add eggs, and then cinnamon. Whisk until smooth.
Begin heating your large pan over medium heat. You want a healthy sizzle when you add the butter.
Dip 1-2 bread slices (however many will fit at a time in the pan) into the egg mixture. Do not batter your bread until you are ready to put it in the pan.
Each bread slice should take roughly 3-4 minutes to brown. However, after the first full minute, feel free to peek and see if it has browned to your liking.