I've been trying to make waffles and muffins that have about 50% whole wheat along with regular unbleached flour. They have a nice flavor, but seem kind of chewy and maybe a bit tough. I really try not to overmix, but am not sure what I'm doing wrong. I've been just using recipes that are for regular muffins/waffles and substituting whole wheat flour, but maybe I should be changing something else... Anyone have good recipes for this? Thanks! [Also -- if anyone has a suggestion for a book that has good quick bread and other baking recipes, please share]