Satisfy your sweet tooth with these irresistible oven-baked s'mores bars! Combining graham cracker crumbs, rich chocolate, and fluffy marshmallows, this easy recipe is perfect for any occasion. In just 45 minutes, you'll create a decadent dessert that everyone will love.
1 ½ cups graham cracker crumbs
½ cup unsalted butter, melted
½ cup packed brown sugar
1 teaspoon pure vanilla extract
1 cup mini marshmallows
1 cup semisweet chocolate chips
½ cup chopped walnuts or pecans (optional)