Preheat oven to 350F; grease a 12 cupcake tin, set aside
Using a 4″ cookie cutter, cut out the center of each piece of bread
In a bowl, whisk together eggs, milk, ½ teaspoon cinnamon and 1 tablespoon sugar until smooth
Dip a round piece of bread into the egg mixture then press into the center of cupcake cavity; repeat with remaining 11 rounds
Fill each with a heaping tablespoon of Nutella; cover with another egg dipped bread piece and gently press the edges to adhere and press the into the sides of the tin
Mix together remaining sugar and cinnamon then sprinkle generously over to of each muffin