Preheat the oven to 325°F. Grease and lightly flour a 10- or 12-cup bundt pan.
In the bowl of a stand mixer fitted with the paddle attachment, beat the butter and cream cheese on medium-high speed until smooth, about 2 minutes.
Add the sugar and beat until smooth, about 1 minute.
Add the sour cream, lemon zest, lemon juice and vanilla extract and beat until smooth, about 1 minute.
Add the eggs one at a time, beating on low speed between each addition, just until combined.
Add the flour, baking soda and salt and beat just until combined.
Transfer the batter into the prepared cake pan. Bake the cake until a toothpick inserted comes out clean and the cake is dark golden, 70 to 80 minutes.
Remove the cake from the oven and allow it to cool completely in the pan. While the cake cools, make the glaze.