Preheat the oven to 350°F (175°C) and grease a 9-inch pan.
In a bowl, whisk together flour, sugar, baking powder, baking soda, and salt.
In another bowl, beat together sour cream, eggs, butter, vanilla, lemon zest, and lemon juice.
Add wet ingredients to the dry ingredients and mix until just combined.
Pour the batter into the prepared pan.
Bake for 30-35 minutes, or until a toothpick comes out clean.
Let cool. For the glaze, mix powdered sugar and lemon juice, then drizzle over the cake.