Step 1

Preheat your oven to 350 F and liberally grease a muffin pan with either baking spray or with using the butter and flour method.

Step 2

In a small bowl, combine the flour, baking soda, and salt.

Step 3

In a large bowl, whisk together the sourdough starter with the sugar, egg, melted butter and vanilla. Really whisk it and make sure the starter is well mixed in, or you will get streaks in your muffins.

Step 4

Place the blueberries in a bowl with a few spoonfuls of the flour mixture and toss to coat. This will help them not all sink to the bottom of the muffins.

Step 5

Using a spatula or wooden spoon, add the flour mixture to the starter mixture and mix to combine.

Step 6

Carefully fold in the blueberries coated in flour, as well as any excess flour that is in the bowl the blueberries were in.

Step 7

Evenly spoon the batter into the prepared muffin tin. You will barely have enough batter to fill all 12 muffins about ¾ full.

Step 8

In a separate medium bowl, mix together the ingredients for the sugar coating, using a fork or your fingers to really mix the butter in.

Step 9

Evenly sprinkle the sugar coating over the muffin, being really careful to not get any of the coating on the muffin pan itself.

Step 10

Bake for 20 minutes, or until a toothpick inserted in the middle comes out clean.

Step 11

Allow to rest for 5-10 min in the pan before removing to a wire rack to cool the rest of the way. Use a knife to run along the edges of each muffin and carefully pull them out of the pan.

Step 12

Enjoy!