In a medium bowl, whisk together eggs, milk, vanilla extract, cinnamon, salt, and nutmeg until smooth.
Heat a large skillet or griddle over medium heat and melt the butter.
Dip each sliced Hawaiian roll into the custard mixture, coating both sides without soaking too long.
Place the coated rolls onto the hot skillet.
Cook for 2 to 3 minutes until golden brown and slightly crisp.
Flip and cook the other side for another 2 to 3 minutes.
Repeat with the remaining rolls, adding more butter if needed.
Serve this Hawaiian Roll French Toast Recipe warm with powdered sugar and maple syrup.