I LOVE these brownies! Unlike most other brownie recipes, these are not 'cake', nor are they 'fudge'. They are chewy and not too sweet. More like 'Blondies' but definitely chocolate. My mom made these all the time, and I made them when I was in my teens and early twenties. But as I got older, didn't bake, wanted to reduce my 'sweets' intake and then my mom died, and I no longer had the recipe. I found a 1951 edition of Better Homes and Gardens Cookbook on eBay and ordered it. Here the recipe, just as good as ever! But don't ask me what 'California' walnuts are, I have no idea how they differ from other walnuts.
Melt shortening and chocolate together in a double boiler over hot water and let cool
Sift flour with baking powder and salt
Beat eggs until light; add sugar, then chocolate mixture, and blend.
Add flour, vanilla, and nuts.
Pour batter into well greased 8 inch square pan.
Bake for 30 -35 minutes.
Cool and cut into squares