Prep the taco shells: Preheat oven to 350°F (175°C). Brush the tortillas lightly with melted butter and fold them over the edges of a muffin tin to create a taco shape. Bake for 5–7 minutes until slightly crispy.

Assemble the s’mores filling: While shells are baking, combine chocolate chips, mini marshmallows, and crushed graham crackers in a small bowl.

Fill the tacos: Carefully remove the taco shells from the oven. Spoon the s’mores mixture into each shell evenly.

Melt & toast: Return the filled tacos to the oven for 2–3 minutes, just until the marshmallows puff slightly and chocolate starts to melt. Optional: Use a kitchen torch for a toasted marshmallow finish.

Garnish & serve: Drizzle with caramel or sprinkle with sea salt if desired. Serve immediately for gooey goodness.