Overnight S'mores French Toast Casserole -- A Kitchen Built for Gathering, A Recipe Made to Share

December 2027. The architect sent the first design sketches. I spread them on the kitchen table and Kai stood next to me and we looked at them together for twenty minutes. He asked the right questions: where is the light in winter, which way does the kitchen face, how does the outdoor cooking space connect. I answered what I could and told him I'd ask Carol about the ones I didn't know.

The kitchen was designed as she'd understood it should be—large and central, with a wide window that faced the food forest, a prep island big enough to work with several people at once, a connection through a side door to the outdoor cooking area. The living space wrapped around it rather than being separate from it. The house was built for gathering, and the gathering was built around food. It was right.

There was a small room near the kitchen that Carol had labeled "office/study" in the sketches. I called her and said I wanted that space to be where the food journals and reference materials lived—not an office, a library of sorts. She said she'd adjust the shelving design. She said she thought that was the right function for that room. I said it was where Danny's notebooks would go. She was quiet for a moment and said: I'll make it the kind of room that holds something important.

Christmas was warm, families crowded in the barn, River explaining the house sketches to anyone who would listen. He'd memorized the kitchen layout. He described it to Wren in detail, who was four months old and understood none of it but listened with her eyes open, which River took as attentiveness.

Standing over those kitchen sketches with Kai, tracing the wide prep island and the side door to the outdoor cooking area, I kept thinking about what it actually means to design a space for people—the food has to match the intention. Christmas in the barn, River narrating the floor plan to a four-month-old, families crowded in and warm: that morning called for something that had already done its work the night before, something ready to pull from the oven while the house was still coming alive. This Overnight S’mores French Toast Casserole is exactly that kind of recipe—assembled ahead, abundant, and impossible to share without someone asking for the dish details, much like River with the kitchen layout.

Overnight S’mores French Toast Casserole

Prep Time: 20 minutes | Cook Time: 55 minutes | Total Time: 1 hour 15 minutes (plus overnight soak) | Servings: 10–12

Ingredients

• 1 large loaf brioche or challah bread, cut into 1-inch cubes (about 10–12 cups)
• 1 1/2 cups mini marshmallows, divided
• 1 cup semi-sweet chocolate chips, divided
• 1/2 cup graham cracker crumbs, divided
• 6 large eggs
• 2 1/2 cups whole milk
• 1/2 cup heavy cream
• 1/3 cup granulated sugar
• 2 teaspoons pure vanilla extract
• 1/4 teaspoon fine sea salt
• 2 tablespoons unsalted butter, for greasing
• Powdered sugar, for serving (optional)
• Maple syrup, for serving (optional)

Instructions

1. Prepare the baking dish. Grease a 9x13-inch baking dish generously with butter. Spread half of the bread cubes in an even layer across the bottom of the dish.
2. Layer the s’mores fillings. Scatter half of the mini marshmallows, half of the chocolate chips, and 3 tablespoons of the graham cracker crumbs over the first layer of bread. Add the remaining bread cubes on top, then scatter the rest of the marshmallows and chocolate chips over the surface.
3. Make the custard. In a large bowl, whisk together the eggs, milk, heavy cream, granulated sugar, vanilla extract, and salt until fully combined and smooth.
4. Soak overnight. Pour the custard evenly over the bread and filling layers, pressing gently so the bread absorbs the liquid. Cover tightly with plastic wrap and refrigerate for at least 8 hours or overnight.
5. Preheat and top. When ready to bake, remove the casserole from the refrigerator and let it sit at room temperature for 20 minutes. Preheat the oven to 350°F. Sprinkle the remaining graham cracker crumbs evenly over the top.
6. Bake covered. Cover the dish with foil and bake for 35 minutes, until the custard is mostly set.
7. Finish uncovered. Remove the foil and bake for an additional 18–20 minutes, until the top is golden, the marshmallows are toasted, and the center is fully set when gently shaken.
8. Rest and serve. Allow the casserole to rest for 10 minutes before cutting. Dust with powdered sugar and serve with warm maple syrup if desired.

Nutrition (per serving)

Calories: 420 | Protein: 11g | Fat: 18g | Carbs: 54g | Fiber: 2g | Sodium: 310mg