Step 1: Preheat Oven

• Preheat your oven to 350°F (175°C). Ensure your 10-inch cast iron skillet is clean and dry.

Step 2: Brown the Butter

• Melt butter in the skillet over medium heat, stirring constantly.
• Cook until the butter turns golden brown and develops a nutty aroma (4–5 minutes). Remove from heat and let cool slightly.

Step 3: Mix Sugars with Butter

• Stir granulated sugar and brown sugar into the browned butter until well combined.

Step 4: Add Wet Ingredients

• Whisk eggs into the sugar mixture, one at a time.
• Stir in vanilla extract.

Step 5: Incorporate Dry Ingredients

• In a separate bowl, sift together flour, cocoa powder, baking powder, and salt.
• Gradually fold the dry ingredients into the wet mixture until just combined.

Step 6: Add Chocolate Chips

• Gently fold in the chocolate chips, reserving a few for topping.

Step 7: Bake the Brownie

• Spread the batter evenly in the skillet and sprinkle reserved chocolate chips on top.
• Bake for 25–30 minutes, or until a toothpick inserted in the center comes out with moist crumbs.

Step 8: Cool and Serve

• Let the brownie cool slightly before serving. Enjoy warm, topped with ice cream or caramel sauce.