Creating perfect S’mores Brownies is straightforward if you follow these steps:

1. Preheat the Oven: Set your oven to 350°F (175°C) and grease a 9×13 inch baking pan.
2. Melt the Butter: In a medium saucepan, melt the unsalted butter over low heat.
3. Mix Sugar and Eggs: Remove from heat and stir in the granulated sugar until well combined. Integrate the eggs one by one, mixing in the vanilla extract afterward.
4. Combine Dry Ingredients: In a separate bowl, whisk together the flour, cocoa powder, salt, and baking powder.
5. Incorporate Dry into Wet: Gradually add the dry mixture to the wet ingredients, mixing until just combined.
6. Add Chocolate Chips: Gently fold in the semi-sweet chocolate chips to the batter.
7. Spread the Batter: Pour the batter into the prepared baking pan, smoothing it evenly with a spatula.
8. Bake: Place in the oven and bake for about 25-30 minutes or until a toothpick inserted in the center comes out with a few moist crumbs.
9. Add S’mores Topping: Immediately after removing from the oven, sprinkle the graham cracker crumbs evenly over the top. Then add mini marshmallows on top of the crumbs.
10. Broil: Return the brownies to the oven on the top rack under the broiler for about 1-2 minutes. Keep a close eye on them to avoid burning. The marshmallows should become golden brown.
11. Cool: Allow the brownies to cool in the pan for about 10 minutes before cutting into squares for serving.

These steps will guide you in creating S’mores Brownies that will be a hit with everyone!