For the crumb topping, my favorite is from the blueberry crisp recipe in “The Berkshires Farm Table Cookbook” by Elisa Spungen Bildner and Robert Bildner (The Countryman Press/W.W. Norton & Company, ...
dipped in blueberry icing and streusel topping, and an Apple Crumble Doughnut, which is an unglazed shell doughnut with apple pie filling, topped with pie crust buttercreme and cinnamon cookie ...