01 -
Gather and measure all ingredients. Preheat oven to 375°F (190°C) and line a 12-cup muffin tin with paper liners or grease well.
02 -
In a medium bowl, whisk together flour, baking powder, baking soda, and salt.
03 -
In a large bowl, mix melted butter, sourdough starter, buttermilk, egg, vanilla extract, and sugar until well combined.
04 -
Gradually add the dry ingredients to the wet ingredients, stirring just until combined. Be careful not to overmix.
05 -
Gently fold in the blueberries and any optional add-ins like lemon zest or spices.
06 -
For best flavor, cover and allow the batter to rest in the refrigerator overnight. Or proceed directly to baking.
07 -
Fill each muffin cup about 3/4 full with batter. If desired, sprinkle with additional toppings or drizzle with honey/maple syrup. Bake for 18-22 minutes, or until a toothpick inserted in the center comes out clean.
08 -
Allow muffins to cool in the pan for 5 minutes, then transfer to a wire rack to cool completely. Enjoy warm or at room temperature.