* I recommend
King Arthur 100% Whole Wheat Flour which is non-GMO.
* I purchased chopped walnuts (rather than whole). I measure out ½ cup of walnuts and if they’re not chopped finely enough, then I chop them. Since the walnuts are in the topping, I prefer them to be smaller.
* I recommend using
SACO Cultured Buttermilk Blend in place of fresh buttermilk. You’ll find it in the baking section of your grocery store. Follow directions on the container for use. It keeps for a few years refrigerated so you always have buttermilk on hand.
* Recipe can be doubled and baked in a 9” x 13” pan for 40 to 45 minutes or until a toothpick inserted in the center comes out clean.