1small splashmilkto get it to the consistency you like
Preheat waffle maker.
In a shallow dish, whisk eggs, milk, vanilla and cinnamon together until combined. Dip cinnamon bread into egg mixture to coat. Brush hot waffle iron with plenty of melted butter and place egg coated cinnamon bread on. Close iron and cook according to directions OR until bread is cooked completely and browned.
While french toast is cooking, mix powdered sugar, vanilla and milk together to create glaze. Add as much milk as desired to get the consistency you like.
Once french toast is done cooking, drizzle with glaze and serve warm. Feel free to melt extra butter on top as well.