Blueberry Muffin Bread

all-purpose flour (spoon & leveled)

baking soda

baking powder

salt

unsalted butter, softened to room temperature

granulated sugar

packed light or dark brown sugar

large eggs, at room temperature

sour cream, at room temperature

and 1/2 teaspoons pure vanilla extract

milk, at room temperature

and 1/2 cups (250g) fresh or frozen blueberries*

optional: 2 Tablespoons blueberry jam and/or crumb topping (see recipe note)