BLUEBERRY CRUMB TOPPING RECIPES

Steps:

• For the cake:
• Preheat the oven to 350 degrees F. Butter and flour a 9-inch round baking pan.
• For the streusel:
• Combine the granulated sugar, brown sugar, cinnamon, and nutmeg in a bowl. Stir in the melted butter and then the flour. Mix well and set aside.
• For the cake:
• Cream the butter and sugar in the bowl of an electric mixer fitted with the paddle attachment on high speed for 4 to 5 minutes, until light. Reduce the speed to low and add the eggs 1 at a time, then add the vanilla, lemon zest, and sour cream. In a separate bowl, sift together the flour, baking powder, baking soda, and salt. With the mixer on low speed, add the flour mixture to the batter until just combined. Fold in the blueberries and stir with a spatula to be sure the batter is completely mixed. 
• Spoon the batter into the prepared pan and spread it out with a knife. With your fingers, 
• crumble the topping evenly over the batter. Bake for 40 to 50 minutes, until a cake tester comes out clean. Cool completely and serve sprinkled with confectioners' sugar.

Steps:

• Make the dough: Pulse the whole-wheat flour, all-purpose flour, granulated sugar, vinegar, salt and about one-third of the butter in a food processor until the butter is incorporated. Add the remaining butter and pulse until it is in pea-size pieces. Add 2 tablespoons ice water and pulse until the dough just comes together. Pinch a small piece of dough: If it doesn't hold together, add up to 2 more tablespoons ice water, pulsing, 1 tablespoon at a time. Turn the dough out onto a large piece of plastic wrap and press into a ball. Pat into a 1/2-inch-thick disk and wrap tightly. Refrigerate until firm, at least 1 hour.
• Roll the dough into a 12-inch round on a lightly floured surface or between 2 pieces of lightly floured parchment paper. (If the dough becomes soft, refrigerate until firm.) Center the dough in a 9-inch pie plate. Fold the overhang under itself and crimp the edges; refrigerate 30 minutes. Meanwhile, preheat the oven to 350 degrees F.
• Lightly pierce the bottom and sides of the crust with a fork, then line with parchment paper or foil and fill with pie weights or dried beans. Bake 20 minutes, then remove the parchment and weights and continue baking until lightly golden, about 10 more minutes. Transfer to a rack and let cool completely.
• Meanwhile, make the filling: Bring 3 cups blueberries, 1/2 cup granulated sugar and the lemon zest to a simmer in a saucepan over medium heat, crushing the berries slightly with a wooden spoon. Cook, stirring occasionally, until reduced by half, about 20 minutes. Discard the lemon zest. Transfer the blueberry mixture to a bowl; stir in the remaining 3 cups berries and 1/4 cup granulated sugar, the lemon juice, whole-wheat flour, nutmeg and salt. Let cool completely.
• Make the topping: Combine the nuts, brown sugar, whole-wheat flour, butter and salt. Squeeze the mixture into clumps with your hands and scatter on a baking sheet. Freeze 30 minutes.
• Increase the oven temperature to 375 degrees F. Pour the blueberry filling into the crust and top with the frozen crumb topping. Transfer to a baking sheet and bake until the filling is bubbly and the topping is golden brown, 45 to 55 minutes. (If the topping browns too quickly, cover it with foil.) Transfer the pie to a rack and let cool overnight, or at least 4 hours, so the filling sets.