Preheat your oven to 350°F (175°C) to ensure it’s ready for baking when your Hawaiian Roll French Toast Bake is assembled.

Grease your 9x13-inch baking dish thoroughly with butter or cooking spray to prevent sticking.

Carefully slice the Hawaiian rolls horizontally, creating a top and bottom layer. Place the bottom half snugly in the prepared baking dish.

In a large mixing bowl, whisk together the eggs, milk, sugar, vanilla extract, ground cinnamon, and salt until the mixture is smooth and homogenous.

Pour half of the custard mixture evenly over the bottom half of the sliced rolls. Allow them to soak for about 5 minutes.

Once the bottom layer has soaked, carefully place the top half of the sliced rolls over the soaked base. Pour the remaining custard mixture over the top layer.

Melt some butter and drizzle it over the assembled bake for added richness.

Cover the dish with plastic wrap and refrigerate for at least 30 minutes, or up to overnight.

Remove the plastic wrap and bake the casserole uncovered for 35-40 minutes.

Once baked, remove your Hawaiian Roll French Toast Bake from the oven and let it sit for 5-10 minutes before serving.