How to crumb butter and flour

How to crumb butter and flour

Making a crumb from butter and flour is used as a starting point homemade pastry as in Tom Aikens'asparagus and chervil quiche. Ensure the butter is cold before starting. Once finished, flavour can be added to the crumb such as ground spices, fruit zest or nuts such as Adam Gray's apple and blackberry crumble with a macadamia nut and vanilla topping.