In a large bowl add in Egg (4), Milk (1 1/2 cup), Brown Sugar (1/2 cup), Vanilla Extract (1 teaspoon) and Dry Mixed Spice (1 teaspoon). Whisk until combined. Add into a jar or container that you can pour.
In a large baking dish place down a layer of White Bread (12 slice). Layer and pour some of the mixture. Repeat until you have layered all the bread. Top with Brown Sugar (to taste) and more Dry Mixed Spice (to taste).
Place in fridge for at least an hour or overnight.
Preheat your oven to 350 degrees F (180 degrees C).
Place French Toast in oven for 25-30 minutes or until golden brown.
Top with Powdered Confectioners Sugar (to taste) and serve immediately while warm. Enjoy!