In a medium bowl, beat the eggs, sugar, and vanilla and then stir in the milk.
Soak the slices of bread in the mix 1 at a time, waiting until it’s evenly soaked, about 2 minutes per side.
In a large-ish skillet over medium heat, melt 1 chunk of butter.
Add 2 slices of bread to the skillet at a time, first allowing any excess milk mixture to drip off. Cook until golden brown and crisp at the edges, 2 to 3 minutes per side. You may need to lower the heat a little to keep the bread from overbrowning.
Move to a plate. Repeat with the remaining butter and bread.
Drizzle with honey or maple syrup, if desired. Devour immediately.