Preheat the oven to 325°F (165°C). Grease and flour a 10-inch bundt pan.
In a large bowl, cream the butter and sugar together until light and fluffy. Add the eggs one at a time, beating well after each addition.
In a separate bowl, whisk together the flour, baking powder, baking soda, and salt.
In another bowl, combine the sour cream, lemon zest, lemon juice, and vanilla extract.
Gradually add the dry ingredients to the creamed mixture, alternating with the sour cream mixture. Begin and end with the dry ingredients.
Pour the batter into the prepared bundt pan and smooth the top. Bake for 55-65 minutes or until a toothpick inserted into the centre comes out clean.
Allow the cake to cool in the pan for 15 minutes before inverting it onto a wire rack to cool completely.