For the most traditional looking zucchini bread, a loaf pan resting inside the slow cooker is going to give you the best results. Your slow cooker is going to act like a miniature oven (but without heating up your kitchen). This is the method we prefer for the best looking and tasting zucchini bread. However, if you cannot find a loaf pan that fits inside your slow cooker you can pour the batter directly in the slow cooker (greased or buttered first) and cook it that way. Keep in mind that some slow cookers have the heating element on in the base located on the sides and as such you may find that your slow cooker heats hotter on one side. To prevent burning or overcooking, simply flip the stoneware crock a few times while cooking.