Whisk the eggs and milk (sugar, cinnamon and vanilla if using) together until well combined.
Heat a medium sized fry pan over medium heat and add half a teaspoon of butter.
Dip two bread slices in the egg mixture for 30 seconds before flipping over for another 30 seconds.
Place the bread slices in the frypan and cook for 5 minutes each side over medium to medium low heat. Check every few minutes to make sure the french toast isn't burning.
To check the toast is ready press in the center and if it springs back its cooked through. Repeat with remaining bread slices before serving with maple syrup.
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Notes
Sugar, cinnamon and vanilla are all optional depending on what flavor you would like for your french toast. French toast can be served savoury so the sugar wouldn't be added.About 1 inch or 2-3cm bread slices work really well for this recipe. Any type or size of bread can be used, it just may need a shorter or longer cooking time. Make sure you are using stale bread for french toast. The more stale and dry the bread is the more it can soak up the custard mixture.