Makes one 9-inch crust.

INGREDIENTS

  • 1 1/4cups all purpose flour
  • 1/4cup whole wheat flour
  • 1tablespoon sugar
  • 1/2teaspoon salt
  • 1/2cup (1 stick) chilled unsalted butter, cut into 1/2-inch pieces
  • 1large egg yolk
  • 3tablespoons (or more) ice water

    DIRECTIONS

    Blend first 4 ingredients in processor. Add chilled butter and cut in using on/off turns until mixture resembles coarse meal. Whisk egg yolk and 3 tablespoons ice water in small bowl to blend. Add egg yolk mixture to processor and blend until moist clumps form, adding more water by teaspoonfuls if dry. Gather dough into ball; flatten dough into disk. Wrap dough in plastic and chill 1 hour. (Can be prepared 2 days ahead. Keep refrigerated. Let dough soften slightly at room temperature before rolling out.)