Ingredient: Semisweet chocolate bits

I found the recipe in a book of random recipes that I took when we cleaned out Mum’s apartment recently. I made the recipe today but made cupcakes so Aiden and Livy could decorate them…I notice there is no Baking Powder in the recipe and am not sure if it is needed. Also, the recipe does not say when to add the chocolate so I alternated with the dry ingredients. The cupcakes tasted good. Would someone else try this recipe and let me know what they think…Does it require baking powder, etc…? I wonder if Mum wrote this from memory as it isn’t on one of her old recipe cards..so some things could be missing

These are the blonde brownies that Mom (Anna Paquette) used to make when we were kids. They come out best if you mix by hand. If you use an electric mixer they tend to get hard in a day or two.