Happy Birthday brownies – revisited

This recipe comes from one of my favourite books, Cooking Texas Style by Cindy Wagner and Sandra Marquez. My copy was purchased at the Alamo in 1991. I have been making the brownies ever since. Some years I get confused about cups and ounces and am still not totally sure what a cup of butter is but have done my best to translate the recipe into metric units. I’ve made some changes - halving the sugar...