First start by preheating the oven to 350F then line a 9"x5" baking pan with parchment paper.
In a medium bowl sift in the flour, baking powder, baking soda, and salt and set aside. In a small bowl, add in the dry blueberries with the 1 tbsp of flour and mix until they're fully coated.
In a stand mixer bowl, cream the butter, oil, and granulated sugar until light and creamy. Add in the vanilla and lemon extract and mix. Add in one egg at a time while continuing to mix everything together. Lastly add in the yogurt, lemon zest, and lemon juice, and mix one last time.
Add in the dry mixture to the wet mixture and fold just until the flour disappears. Add in the flour coated blueberries and fold one last time. Pour the mixture in the prepared loaf pan and bake for 50-55 minutes or until a wooden skewer inserted in the center comes out clean. Cool the bread in the pan for about 30 minutes then more it to a cooling rack. Let it cool down completely.
Make the lemon glaze
Make the glaze by whisking together the powdered sugar, lemon juice, lemon zest, and milk, then pour the glaze over the completely cooled lemon blueberry loaf. Allow the glaze to set before slicing into the loaf cake!
Notes
If the loaf starts to brown too quickly, wrap the loaf pan with aluminum foil.You can store this cake in an airtight container in the fridge for up to 4 days.