In his recipe, he uses a mixture of flour, oats, melted butter, white and brown sugar and some Grape-Nuts. He uses half a cup of the cereal, but you can adjust that based on how much apple crisp ...
The oats toast as the dessert bakes, giving the crumble a crispy texture. Plus, an apple crisp still lacks a crusty exterior around the sides. A crisp is simply held together by the dish in which ...