2 cups (400 grams) ripe sourdough starter 1 ½ cups (200 grams) bread flour or white unbleached flour (11–13% protein content) 1 ½ cups (210 grams) white whole wheat flour 1 cup (110 grams) chopped walnuts 1 ½ tablespoons vegetable oil 2 teaspoons salt 1 teaspoon instant yeast 1 cup + 2 tablespoons (236 grams) lukewarm water
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