Source is unknown and I don’t recognize the handwriting on the piece of paper. Sorry, I can’t give credit.
1/2 cup flour
1/3-1/2 cup cocoa
1/3 cup butter, melted
1 cup sugar
1 tsp vanilla
1 cup semi-sweet chocolate chips (optional, but who wouldn’t include them???)
Sift or combine flour and cocoa and set aside.
In bowl combine cooled melted butter, sugar, eggs and vanilla.
Stir in flour/cocoa mixture.
Add chocolate chips and mix well.
Spread in a greased 8×8 pan and bake at 350 for 25 minutes or until brownies spring back, when lightly touched.