01 - Preheat oven to 350°F (175°C). Grease a standard 12-cup muffin tin with butter or nonstick spray.
02 - Evenly distribute the cubed bread among the muffin cups, filling each about three-quarters full.
03 - In a large mixing bowl, whisk eggs, whole milk, heavy cream, granulated sugar, vanilla extract, ground cinnamon, and salt until well combined.
04 - Pour the custard mixture evenly over the bread cubes in the muffin tin, pressing lightly to ensure the bread absorbs the liquid.
05 - Let the filled muffin tin rest for 10 minutes to allow the bread to soak in the custard.
06 - Top each cup with fresh berries if desired.
07 - Bake for 25 minutes or until the tops are golden brown and centers are set.
08 - Cool for 5 minutes before gently removing the French toast cups from the pan.
09 - Serve warm, dusted with powdered sugar and drizzled with maple syrup.