¼teaspoonsalt (you can omit if using salted butter)
1teaspoonvanilla extract
½cupsifted cake flour or ⅓ cup all-purpose(45 grams)**
1cupwalnut pieces or other nutsoptional
⅓cupsemisweet chocolate chunks or chips
Instructions
Preheat oven to 325 degrees F. Grease an 8-inch metal or glass pan and line bottom with a piece of parchment paper.
In a mixing bowl or a saucepan, whisk together all of the ingredients. You can do it in any order. I do it this way: Melt the butter in a saucepan, add the cocoa powder and stir until smooth, then add the brown sugar. Stir until smooth, then add the egg and vanilla. Stir, then stir in the flour. Once that's absorbed, stir in half the nuts.
Spread the mixture evenly in the pan. Sprinkle remaining nuts and the chocolate chips on top.. Bake for aboutt 23 minutes at 325F.
Notes
Feel free to use ½ cup cake flour, sifted (60 grams). I'm still not sure what the correct measurement is, but I've been using ½ cup sifted cake flour (45 grams) or ⅓ cup unsifted AP.