Preheat your oven to 350°F (175°C) and line your baking dish with parchment paper to prevent sticking.
Step 2: Prepare the Brownie Batter
In a large bowl, melt the butter and whisk in the sugar until smooth. Add the eggs one at a time, mixing well after each addition. Stir in the vanilla extract.In a separate bowl, sift together the flour, cocoa powder, and salt. Gradually add the dry ingredients to the wet ingredients, stirring until combined. Fold in the chocolate chips.
Step 3: Bake
Pour the batter into the prepared baking dish and spread it evenly. Bake for 25-30 minutes, or until a toothpick inserted in the center comes out with a few moist crumbs.
Step 4: Cool and Cut
Let the brownies cool completely before cutting them into squares.
Choosing the Right Ice Cream
The beauty of a brownie sundae is that you can choose any ice cream flavor you like. Vanilla is a classic choice, but feel free to get creative with flavors like salted caramel, mint chocolate chip, or strawberry.