In a medium-large bowl, whisk together the sugar and the oil. The texture will be a little sandy at this point.
Add the eggs, one at a time, whisking for 30 seconds after each addition. Add the milk and vanilla. Stir until nice and creamy.
Add the lemon zest, baking powder and salt, stirring until incorporated.
Add the flour, and stir just until it disappears. Lastly, add the sour cream and stir to create a nice smooth texture.
Scrape the batter into the prepared pan and bake for 50-60 minutes until the cake is nicely domed and the top is a beautiful golden brown. If you notice the top edges of the cake getting golden brown before the top, just pull up the foil around the edges of the pan for the last 5-10 minutes.
You can use a toothpick to determine doneness - it should come out clean when interested into the center of the cake. The BEST way to test the doneness is with an instant thermometer. The temperature will read 200-205˚F when perfectly done.
Transfer the cake to a wire rack and allow to cool for 20 minutes, then flip it out onto a wire rack that has been placed on top of a piece of foil or parchment paper (this will catch the drips when you glaze the cake). If you use a tube pan, you’ll flip it twice so that the domed up is up. With a Bundt cake pan, the top will become the bottom of the finished cake.
While the cake is resting in the pan, make the lemon glaze.
Cool for an hour before finishing with the lemon glaze. . Once the cake has cooled for about an hour, mix together the ingredients for the glaze. Add more powdered sugar as needed to reach desired consistency. If you have leftover glaze, wait a few minutes for the first layer of glaze on the cake to harden a little and then just add another layer. You can continue doing this until you use all of your glaze.