Fudgy, rich chocolate brownies that are impossibly easy to make. These one-bowl brownies are the perfect treat for chocolate lovers.

Preheat oven to 350°F (175°C). Grease an 8x8 inch baking pan.
In a large bowl, mix melted butter and sugar until combined.
Beat in eggs one at a time, then add vanilla.
In a separate bowl, whisk together cocoa, flour, salt, and baking powder.
Gradually stir dry ingredients into wet ingredients.
Fold in chocolate chips if using.
Spread batter evenly in prepared pan.
Bake for 25-30 minutes until a toothpick comes out with a few moist crumbs.
Cool completely before cutting into squares.