How to Make a Pie with a Crumb or Streusel Top

The difference between a crumb topping and a streusel is simply that a crumb is made with cold butter that is broken into pieces, while a streusel is made with melted butter that is poured over the dry ingredients. Crumb- or streusel-topped pies have a little extra sweetness and crunch that goes really well with a fruit pie. The warm nuttiness and additional sweetness offer a pleasant contrast to the bright, tart filling of pies like a Sour Cherry or