To prepare a ultimate french toast recipe, you first need to prepare the bread. Preheat the oven to 375 degrees F (190 degrees C) and grease the bottom and sides of the griddle with butter or margarine. Mix the flour, baking powder, sugar, cinnamon, and salt together. Add the milk and stir to combine. Pour the batter into the greased pan and bake for 20 to 25 minutes or until the top is golden brown. Remove the pan from the heat and allow to cool for 5 minutes before slicing and serving.