When I need an easy dessert that feels a little nostalgic but still disappears fast at a get-together, this 5-ingredient oven baked summer sweet is exactly the kind of recipe I reach for. Whole graham crackers bake up with buttery sweetness and melty toppings for a simple sheet pan treat that tastes like a shortcut version of a campfire favorite, but without needing to stand outside over a fire.
This sweet is great served slightly warm with cold vanilla ice cream, fresh strawberries, or a handful of raspberries on the side to make it feel extra summery. If you are bringing it to a party, I like cutting it into easy bars and pairing it with iced coffee, cold brew, or a glass of milk for a simple dessert spread that works for both kids and adults.
5-Ingredient Oven Baked Summer Sweet
Servings: 12
Ingredients
12 whole graham cracker sheets
1/2 cup unsalted butter, melted
1/2 cup packed brown sugar
1 1/2 cups semisweet chocolate chips
2 cups mini marshmallows
Directions
1. Preheat the oven to 350°F. Line a sheet pan or 9x13-inch baking pan with parchment paper or lightly grease it for easier cleanup.
2. Arrange the whole graham cracker sheets in a single layer in the prepared pan, breaking a few as needed just to fit the space snugly.
3. Stir the melted butter and brown sugar together, then drizzle or brush the mixture evenly over the graham crackers.
4. Sprinkle the chocolate chips evenly over the top, then scatter the mini marshmallows across the pan.
5. Bake for 8 to 10 minutes, or until the chocolate is soft and the marshmallows are lightly golden. Watch closely during the last couple minutes so the marshmallows do not brown too much.
6. Let the pan cool for 10 to 15 minutes so everything can set slightly, then cut or break into pieces and serve warm or at room temperature.
Variations & Tips
Use milk chocolate: If you want a more classic s'mores-style flavor, swap the semisweet chips for milk chocolate chips. It makes the bars a little sweeter and especially kid-friendly.
Add fruit after baking: For a fresher summer feel, scatter sliced strawberries or raspberries over the top after the dessert comes out of the oven. I would not bake the fruit in the pan because it can make the crackers soft.
Make cleaner bars: If you need neat pieces for a party tray, let the dessert cool completely before slicing. For a gooier, more casual treat, serve it warm with a spatula and let everyone scoop their own piece.
Prevent overbrowning: Marshmallows can go from golden to too dark pretty quickly, so start checking early. If the top is browning before the chocolate melts enough, loosely tent the pan with foil for the final minute or two.
Try a pinch of salt: A very light sprinkle of flaky salt right after baking helps balance the sweetness and makes the chocolate flavor pop a little more.