Add your bread to a large baking dish and pour the apple cider over top. Depending on the size of your baking dish and your bread, you may have to do this in two rounds. Remove the bread quickly and set aside.
4 slices stale bread, 1 cup apple cider
Add the cinnamon and brown sugar to the baking dish with the leftover apple cider. Use a fork or whisk to combine.
½ teaspoon cinnamon, 1 tablespoon brown sugar
Add the eggs and milk to the dish with the cinnamon-sugar cider and beat until well-combined.
¼ cup milk of choice, 2 large eggs
Add about 2 tablespoons of butter to a large frying pan over medium heat and allow butter to melt, tilting the pan to coat the bottom with butter.
3 tablespoons unsalted butter (for frying)
Once your pan is hot and butter is melted, dip cider-soaked bread into the egg wash, one slice at a time, coating both sides and transferring immediately to the hot pan.
Allow your French Toast to fry for 2-5 minutes before flipping and cooking on the other side. Both sides should be golden brown.
Repeat for all 4 slices of bread, adding more butter to the pan as needed. Serve hot with maple syrup or Sautéed Cinnamon Sugar Apples.