Rebecca Masson of Houston’s Fluff Bake Bar tops her dense and delicious apple pie with a thick layer of crisp, buttery crumble. Make the crust Step 1 In a food processor, pulse the flour with the granulated sugar and salt. Add the butter and pulse until the mixture resembles coarse meal with some pea-size pieces remaining. Sprinkle the ice water and vinegar on top and pulse until evenly moistened. Turn the dough out onto a work surface, gather up any crumbs and form into a ball. Flatten into a…See More