I like the Betty Crocker one too, Curious. Here is another good one:
This is from Cook's Illustrated's Dutch Apple Pie:
Streusel Topping
1 1/4 c all-purpose flour
1/3 c light brown sugar, packed
1/3 cup granulated sugar
1 T cornmeal
7 T unsalted butter, melted
For the streusel topping:
Combine flour, sugars, and cornmeal in medium bowl; drizzle with melted butter and
toss with fork until evenly moistened and mixture forms many large chunks with pea-
sized pieces mixed throughout. Line rimmed baking sheet with parchment paper and
spread streusel in even layer on baking sheet. Bake streusel until golden brown,
about 5 minutes. Sprinkle streusel evenly over pie filling. Set pie plate on now
empty baking sheet and bake at 425 Fº until streusel topping is deep golden brown, about 10
minutes. Cool on wire rack and serve.