How to Make It
Preheat oven to 350°F. Line a sheet pan with parchment paper or greased aluminum foil.
Grate the cold butter on the large holes side of a box grater. Using a handheld mixer, combine with the sugar, spice, and salt, adding flour ¼ cup at a time until the mixture forms large crumbs. You might not use all the flour, and that's OK.
Use your hands to sprinkle the crumbs evenly across the sheet pan, and give it a little shake to help separate them. Bake for ten minutes, give another shake, and continue shaking and baking every 5 minutes until the crumb is browned and cooked through to your liking.