First, preheat the oven to 350 degrees F. (176 C) And spray the muffin pan with cooking spray or grease it with shortening.
In a large bowl whisk together the eggs, milk, sugar, cinnamon, and vanilla extract. You can use a mixer or blender too if you like.
Cut 8 to 10 slices of bread into roughly one-inch cubes. Start with 8, you can always cut up more if needed.
Add the cubes of bread to the bowl of batter. Fold with a spatula or spoon, don't stir, so the bread gets coated evenly. If there are still puddles of batter on the bottom of the bowl, cut up another slice or two of bread and add those cubes.
Scoop the battered bread cubes into the muffin pan, I like to mound them high, but you can get a few extra in another pan if you don't mound them. Mix together a half teaspoon of cinnamon with 1/4 cup of sugar and then sprinkle it on the top of each one.Bake in the oven for 25 to 30 minutes until golden brown and a little crispy on top.
Once baked, remove them from the oven and allow them to cool for a few minutes. Then use a butter knife to go around the edges to loosen them up. Remove them from the pan and serve warm on a plate. Top with more cinnamon and sugar, whipped cream, maple syrup, fresh fruit, powdered sugar, etc. Enjoy!