Melt butter in microwave & add brown sugar. Stir until mixed.
Pour butter/sugar mix into bottom of 9 x 13 pan. Spread around.
Beat eggs, milk, & vanilla.
Lay single layer of bread in pan.
Spoon 1/2 of egg mixture on bread layer.
Add 2nd layer of bread.
Spoon on remaining egg mixture.
Cover & chill in fridge overnight.
Bake at 350 for 45 minutes.
Sprinkle with powdered sugar.
Serve with warm maple syrup.
Top should be crusty; middle, soft & moist; & bottom, just glorious!
Recipe from http://sheldonrachel.blogspot.com