Semolina and Keeping your waffles warm will help them stay crispy. As you cook each waffle, pile them onto a lined baking sheet, and place them into the oven at 300° F (148° C) so that they stay warm and crisp. These waffles will tend be more moist because of spinach and tofu You can also warm them back up in the oven, toaster oven, or waffle maker to crisp them back up, if they're come to room temperature or you've stored them for later in the fridge.