01 - Preheat oven to 350°F. Grease a standard 12-cup muffin tin thoroughly with butter or nonstick spray.
02 - Distribute the cubed bread evenly among the muffin cups, filling each about three-quarters full.
03 - In a large mixing bowl, whisk together eggs, whole milk, heavy cream, granulated sugar, vanilla extract, ground cinnamon, and salt until fully blended.
04 - Pour the custard mixture evenly over the bread cubes in each muffin cup, pressing gently to help the bread absorb the liquid.
05 - Allow the muffin tin to rest for 10 minutes to ensure complete absorption of the custard.
06 - Distribute fresh berries over each cup if desired.
07 - Transfer the tin to the middle rack and bake for 25 minutes or until the tops are golden and centers are set.
08 - Let cool for 5 minutes before gently lifting each French toast cup from the muffin tin.
09 - Serve warm, dusted with powdered sugar and drizzled with maple syrup as preferred.