Place all ingredients in the bowl of food processor. Pulse until coarse crumbs are formed.
Alternatively, combine the flour, sugar, and butter in a mixing bowl with a pastry blender. Stir in the nuts, cinnamon, and extract.
Sprinkle the crumb toping over unbaked pies, muffins, cakes, coffeecakes, or muffins. Bake according to recipe directions.
Notes
I use cinnamon in this recipe, but feel free to play with the recipe. Try nutmeg or cardamom. Vanilla instead of almond extract. Different nuts or seeds could be added.