If you prefer your brownies without any added nuts, simply omit the pecans in the brownie recipe.
You can also try using less white granulated sugar and dark chocolate chips instead of regular chocolate chips if you prefer a slightly less sweet and more bitter brownie flavor.
If you have made the brownies a few days before serving, try warming them very briefly in the microwave before serving them up.
This dessert would also be wonderful with some vanilla ice cream.