114gramsunsalted butter, at cool room temperature(1 stick)
½teaspoonteaspoon salt
200gramsgranulated sugar(1 cup_
3largeeggs, room temperature(150 grams)
190gramsall purpose flour(1 ½ cups)
¼teaspoonbaking soda
¾teaspoonlemon extract or ½ teaspoon good Boyjian lemon oil
2 ½teaspoonslemon zest**
1tablespoonfresh lemon juice
120gramssour cream, room temperature(½ cup)
Glaze
2teaspoonsbutter(20 grams)
½cupsifted powdered sugar(55 grams)
1-2tablespoonslemon juice(14 to 28 grams)
Instructions
Put the berries in the freezer for about 30 minutes to freeze – this will help keep them from staining the batter.
Preheat oven at 350 degrees F. Grease an 8 ½ by 4 ½ inch loaf pan (9x5 is okay too) and line with a strip of parchment. Dust with flour.
In a stand mixer with the paddle attached, cream the butter, salt and sugar until light and fluffy. On low speed, add the eggs one at a time letting the mixer go for 30 seconds (increasing speed slightly) after each egg. Scrape sides of bowl often.
By hand or with lowest speed of mixer, add all but two teaspoons of the flour (leave the 2 teaspoons behind to dust the blueberries). Stir in baking soda, making sure it doesn't clump, then stir in lemon juice, lemon zest and lemon flavoring. Stir in the sour cream. Remove bowl from the stand, toss the frozen blueberries in the remaining two teaspoons of flour, then stir into the batter.
Spoon the batter into the prepared loaf pan, smoothing edges. Bake the cake for 60-75 minutes or until a toothpick inserted into the center of the cake is clean or a meat thermometer inserted in the center registers 205 degrees F. Make sure to check the cake at about 50 minutes, and if the top is brown, go ahead and cover loosely with foil.
Set the cake on a rack to cool for about 10 minutes. Loosen sides and let cool for another 20 minutes in the pan. Turn the cake from the pan and let cool completely. Make the glaze. Melt the butter in a bowl, add the sugar and stir until it looks pasty and moist. Add one tablespoon of the lemon juice and stir until smooth. If you need more lemon juice then add the rest. Drizzle over the cake
**For more lemon flavor, add up to 4 teaspoons lemon zest