In a mixing bowl, combine softened cream cheese, maple syrup, and ground cinnamon.
Mix until well combined. Adjust the cinnamon to taste. Set aside.
Lay out the brioche bread slices. Spread a generous amount of the cream cheese filling on one side of half of the slices.
Top with the remaining slices to form cream cheese-filled sandwiches. Cut those in half or into bite sized cubes.
In a shallow dish or bowl, whisk together eggs, milk, and vanilla extract until well combined.
Dip each cream cheese-filled sandwich into the custard mixture, making sure both sides are well-coated. Allow the excess to drip off.
In a large skillet over medium heat, melt the unsalted butter until it turns golden brown and has a nutty aroma. Be careful not to burn it.