Chewy chocolate cookies made from boxed brownie mix with optional chocolate chips or nuts.
1 box (18–19 oz) brownie mix
2 large eggs
1/3 cup vegetable oil or melted butter
1 teaspoon vanilla extract
1/2 cup chocolate chips or chunks (optional)
1/2 cup chopped nuts, like walnuts or pecans (optional)
1/4 teaspoon salt (if your mix is unsalted)
Optional mix-ins include chocolate chips, nuts, or a swirl of peanut butter. For vegan cookies, use flax eggs and plant-based oil.