01 -
Set your oven to 350°F (175°C). Coat a loaf pan (8.5 x 4.5 inches) lightly with butter or baking spray.
02 -
In a deep mixing bowl, stir together baking powder, salt, and flour until they’re evenly mixed.
03 -
Take another bowl and whisk together eggs, sugar, and oil (or melted butter). Mix till smooth.
04 -
Start adding the dry ingredients into your wet mixture little by little. Alternate with milk until combined, and then gently stir in sourdough starter.
05 -
Carefully mix in your blueberries, lemon juice, and lemon zest if using. Take care not to overdo it.
06 -
Pour the batter into the loaf pan and level it out. Pop it into the oven for about 50-60 minutes, checking midway and rotating. Remove when a toothpick comes out slightly sticky but mostly clean. Let it cool 5 minutes in the pan before moving to a rack.
07 -
As the bread cools, stir together powdered sugar, lemon juice, zest, and a touch of milk in a small bowl. Adjust the thickness if needed.
08 -
When the loaf is completely cool, drizzle the glaze on top. Let it harden for 10-15 minutes before slicing up.