Ingredients
Method
- Combine starter, milk, sugar, eggs, and zest. Gradually add flour and salt while kneading.
- Incorporate softened butter one tablespoon at a time until the dough is elastic and passes the windowpane test.
- Bulk ferment for 6-8 hours at room temperature, then chill in the fridge overnight.
- Simmer blueberries, sugar, cornstarch, and lemon juice until thickened. Cool completely.
- Roll dough into a rectangle, spread filling, roll into a log, and cut lengthwise to braid.
- Place in loaf pan, rise for 2-4 hours, and bake at 350°F for 45-50 minutes.
Notes
Ensure the blueberry filling is completely cold before spreading, or it will melt the butter in the dough and cause a mess. For the best swirls, use a very sharp knife to cut the log.
