1 ½ cups (340g) active sourdough starter or unfed discard
4 cups (500g) bread flour
1 ½ cups (350g) warm water (100-110°F)
1 ½ teaspoons (10g) salt
2 ¼ teaspoons (7g) instant yeast
Instructions
In the bowl of a stand mixer, combine the sourdough discard, warm water, salt, and instant yeast. Mix with a dough hook or spatula until just combined, about 30 seconds.
Add the bread flour to the bowl. Mix on low speed with the dough hook until a shaggy dough forms, 2-3 minutes.
Increase speed to medium-low and knead for 6-8 minutes, until the dough is smooth, elastic, and pulls away from the sides of the bowl. If kneading by hand, turn out onto a lightly floured surface and knead for 10-12 minutes.
Shape the dough into a ball and place in a lightly greased bowl. Cover with plastic wrap or a damp towel and let rise in a warm place for 60-90 minutes, or until doubled in size.
Gently deflate the dough and turn out onto a lightly floured surface. Press into a 9×5 inch rectangle. Roll up tightly into a log, pinching the seam to seal.
Place the dough log, seam-side down, into a greased 9×5 inch loaf pan. Cover loosely with plastic wrap and let rise for 45-60 minutes, or until risen about an inch above the rim of the pan.
Preheat your oven to 375°F (190°C).
Bake for 35-45 minutes, or until the top is deep golden brown and the internal temperature reaches 190°F (87°C). If browning too quickly, tent with aluminum foil for the last 10-15 minutes.
Let the bread cool in the pan for 10 minutes before turning out onto a wire rack to cool completely before slicing, at least 1-2 hours.
Notes
Sourdough discard can be used straight from the refrigerator without feeding first.
Bread flour is recommended for best texture, but all-purpose flour can be substituted with slightly softer results.
For a softer crust, brush the top with melted butter immediately after baking.
Store at room temperature in a plastic bag for up to 3 days, or freeze sliced bread for up to 3 months.