Source: Renee Ascher (bubbeskitchen)
adapted by http://theresalwaysthyme.blogspot.com
1/2 cup cocoa (I used Dutch Processed Cocoa)
1 stick butter
1 cup sugar
1/4 cup flour
1 cup broken-up walnuts or pecans
1 teaspoon vanilla
pinch of salt
Preheat oven to 325 degrees F.
Melt butter in saucepan with cocoa and stir until smooth. Remove from heat and allow to cool for a few minutes. Mix in eggs, one at a time. Add sugar, flour, nuts, vanilla and salt. Pour into a greased 8x8 square pan. Bake for about 40 minutes. ''Don't overbake!'' They should be gooey. Let cool (an essential step) and cut into bars.
*my note: I baked for a little longer, they were chewy, not gooey. I like them that way! If you like them gooey, then follow the directions and bake them for about 40 minutes or even less.