01 - Preheat oven to 350°F. Grease and flour a 9-inch round cake pan or line with parchment paper.
02 - Whisk together flour, baking powder, baking soda, and salt in a medium bowl until well blended.
03 - Beat butter and sugar in a large bowl until light and fluffy, approximately 3 minutes.
04 - Add eggs one at a time, beating thoroughly after each addition. Mix in yogurt, lemon zest, lemon juice, and vanilla extract until smooth.
05 - Gradually add dry ingredients to wet mixture, alternating with milk. Begin and end with flour mixture, stirring until just combined.
06 - Toss blueberries with 1 tablespoon flour, then gently fold into batter to distribute evenly.
07 - Pour batter into prepared pan, smooth top, and bake for 38-42 minutes until toothpick inserted in center comes out clean.
08 - Allow cake to rest in pan for 15 minutes, then transfer to wire rack to cool completely before glazing.
09 - Whisk powdered sugar and lemon juice until smooth. Drizzle over cooled cake.