
Preheat oven to 325°F.
Grease and flour the bundt pan thoroughly.
In a medium bowl, whisk together the flour, baking powder, baking soda, and salt. Set aside.
Blend the butter in the electric mixer until fully smooth.
Add sugar and beat on medium speed until light and fluffy.
Add lemon zest and blend. Add eggs one at a time.
While mixing, add half of the flour mixture, then the vanilla and milk.
Add the remaining flour, sour cream, and lemon juice. Mix until well incorporated.
Pour batter into prepared pan and smooth the top.
Bake for 60-70 minutes until a toothpick comes out clean.
Allow cake to cool in the pan for about 1 hour before inverting onto a plate.
For the glaze, melt the butter and whisk in powdered sugar and lemon juice until smooth.