These are the brownies I taught my kids to make -- thanks to the cake flour, you can stir them endlessly and they won't get tough. It's originally a Cooks Illustrated recipe.

You can omit the walnuts, and you don't have to line the pan with anything -- the brownies will still come out easily.

We melt the butter and chocolate in the microwave.

https://foolproofliving.com/the-ultimate-brownie/