Now let's talk about my daughter's favorite part of the fruit crisp: the crisp topping. This is, of course, what makes the fruit crisp a crisp. The essential ingredients for the crisp topping is butter, rolled oats and flour.  You can also add nuts, any nuts! Some of my favorites are almonds, pecans, walnuts, hazelnuts and pistachios. Adding some spices help kick up the flavor factor even more. Sprinkle in some cinnamon, nutmeg, ginger or cardamom to your crisp topping.