8tablespoons(1 stick) cold unsalted butter,cut into small pieces
Instructions
Place the granulated sugar, brown sugar, flour, cinnamon, ginger and salt into the bowl of a food processor. Pulse to combine.
Add the cut up chilled butter. Pulse until it becomes nubby but don't let the motor run—you want it to be bumpy, not to come together into a paste.
Now, go top your pie (or muffins or crisp or bread or cake) with your streusel crumb topping!
Video
Notes
You can make streusel topping in a number of ways: you can use your fingers to cut in the cold butter, or two knives, but the easiest way I know, especially if you are making a sizable amount is to use the food processor.