Slice the loaf into thick slices that are between 1/2 and 3/4 inch thick.
Whisk everything together for the egg mixture until it’s smooth and set it aside.
Preheat a large cooking pan over medium heat and lower the heat to medium-low so the outside of the bread doesn’t cook faster than the inside. Grease the pan with a little oil.
Dip each side of the bread into the egg mixture and cook for 3-4 minutes on each side. Depending on the size of the pan, you may need to cook it in batches of 3 or 4 slices at a time.
To keep cooked French Toast warm, preheat the oven to 250° and keep it in the oven while the rest is cooking.
Notes
*Adjust sweetness: Brioche and eggnog already have sugar added so both ingredients are sweetened. It can be a personal preference to add more sugar to the egg mixture or not.Lactose free and dairy free: There are several dairy free and lactose free options on the market. There are almond milk, coconut milk, oat milk, and simply dairy free holiday nog options.