Preheat oven to 350Β°F (175Β°C). Grease and flour a Bundt pan well.
In a bowl, whisk flour, baking powder, baking soda, and salt. Set aside.
In a large mixing bowl, cream butter and sugar until light and fluffy.
Beat in eggs one at a time. Add lemon juice, zest, and vanilla.
Alternate adding the flour mixture and buttermilk, starting and ending with the flour. Mix just until combined.
Pour batter into prepared pan and smooth the top.
Bake for 40β45 minutes or until a toothpick inserted comes out clean.
While the cake bakes, make the lemon drizzle: combine lemon juice and sugar in a small pan and heat until sugar dissolves.
Once cake is done, cool for 10β15 minutes in the pan, then invert onto a rack.
While still warm, brush or drizzle lemon syrup over the cake slowly, allowing it to soak in.
Optional: Once fully cooled, drizzle with a simple powdered sugar + lemon juice glaze for extra shine.