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Close-up of sourdough lemon blueberry muffins drizzled with lemon glaze, showing golden texture and juicy blueberries inside.

Easy Sourdough Blueberry Muffins (With Lemon Glaze)

These sourdough blueberry muffins are soft, tangy, and full of juicy blueberries with a hint of lemon. Made with sourdough discard and topped with a simple lemon glaze, they’re quick to whip up for breakfast, snack time, or a bakery-style treat at home.
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Course: Breakfast, Dessert
Cuisine: American
Prep Time: 10 minutes
Cook Time: 17 minutes
Total Time: 27 minutes
Servings: 0
Author: Stephanie

Ingredients

  • 2 cups 240 g all-purpose flour
  • ¾ cup 150 g sugar
  • 2 ½ teaspoons 10 g baking powder
  • ½ teaspoon 2 g baking soda
  • ½ teaspoon 2 g salt
  • ½ cup 100 g sourdough starter discard (or active starter)
  • ½ cup 115 g melted butter (or melted coconut oil)
  • 2 large eggs
  • ¼ cup 60 g sour cream
  • 2 tablespoons 27 g extra virgin olive oil (or vegetable oil)
  • ¾ cup 180 g/ml milk, room temperature
  • 1 teaspoon 4 g vanilla extract
  • 2 tablespoons lemon zest about 2 fresh lemons
  • 1 tablespoon lemon juice about ½ lemon
  • 1 ¼ cups 190 g blueberries (fresh or frozen, tossed with 1 teaspoon flour before folding in)

For the Lemon Glaze

  • 1 tablespoon lemon juice
  • ½–¾ cup powdered sugar adjust for desired thickness

Instructions

  • Preheat the oven to 350°F (190°C). Line a muffin pan with paper liners or grease lightly. In a large bowl, whisk together flour, sugar, baking powder, baking soda, and salt.
  • In another bowl, whisk the sourdough discard, melted butter, eggs, sour cream, olive oil, milk, vanilla, lemon zest, and lemon juice until smooth.
  • Pour the dry ingredients into the wet mixture and gently fold until just combined—do not overmix.
  • Fold in the flour-coated blueberries.
  • Divide batter evenly into muffin tin (about ¾ full). Bake 18–22 minutes, until a toothpick inserted in the center comes out clean.
  • Let muffins cool for 10 minutes on a wire rack.
  • Stir together lemon juice and powdered sugar to make the glaze, then drizzle over muffins before serving.

Notes

Tips for the Best Sourdough Blueberry Muffins

  • Toss blueberries with a little flour to prevent them from sinking.
  • For extra tang, swap the milk with buttermilk or kefir.
  • These muffins freeze beautifully—just skip the glaze until ready to serve.
  • Use coconut oil instead of butter for a dairy-free option.

Storage

Keep muffins in an airtight container at room temperature for up to 3 days, or refrigerate for up to 5. Freeze (unglazed) for up to 2 months.