
Preheat oven to 325°F.
Grease and flour the bundt pan.
In a medium bowl, whisk together the flour, baking powder, baking soda, and salt.
In the bowl of an electric mixer, blend the butter until fully smooth.
Add sugar and beat on medium speed for 1-2 minutes.
Add lemon zest and blend.
While still mixing, add the eggs, one at a time.
Slowly add half of the flour mixture, then pour in the vanilla and milk.
Add the second half of the flour, then the sour cream and lemon juice.
Blend just until all ingredients are well incorporated.
Pour/scoop batter into prepared pan.
Bake for 60-70 minutes.
Cool in the pan for about 1 hour.
Invert the cake onto a plate.
Melt butter and add powdered sugar, whisking to combine.
Add lemon juice to the powdered sugar mixture and whisk.