Preheat and prepare pan. Position a rack in the center of your oven and preheat the oven to 350°F (177°C). Spray a 9”x5” loaf pan with cooking spray, or line with parchment paper and then spray with cooking spray.
Combine dry ingredients. In a mixing bowl, whisk together 2 cups (240 g) all-purpose flour, 1 cup (200 g) granulated sugar, 1 Tablespoon baking powder, and ½ teaspoon salt. Set aside.
Combine wet ingredients. In a second mixing bowl, whisk together 2 large eggs, ⅔ cup (160 ml) milk, ½ cup (120 ml) neutral-flavored oil, ¼ cup lemon juice (60 ml) and 2 Tablespoons lemon zest until combined.
Combine wet and dry ingredients. Add the dry ingredients to the wet ingredients and mix together with a spatula or wooden spoon just until just combined. Fold in blueberries (I toss them in a teaspoon of flour first so they don’t sink in the batter when baking. Do not overmix.
Bake. Spoon batter into prepared loaf pan. Bake in a preheated 350℉ (177℃) oven for 50-60 minutes until a toothpick inserted into the middle of bread comes out clean or with a few moist crumbs clinging to it (no wet batter) and top springs back to the touch when lightly touched. Remove from the oven and cool completely in the pan on a wire cooling rack.
Make the glaze. In a small bowl, whisk together the confectioners sugar, lemon juice, and vanilla. Adjust consistency if needed. Drizzle over the cooled bread before serving.