Preheat your oven to 350°F (175°C).
Grease your Bundt pan generously with cooking spray or butter, then lightly dust it with flour.
In a large mixing bowl, combine the lemon cake mix and instant lemon pudding mix. Whisk until well blended.
Add the whole milk, vegetable oil, fresh lemon juice, lemon zest, applesauce, and eggs to the dry ingredients. Beat on medium speed for about 2-3 minutes until smooth.
Pour the batter into the prepared Bundt pan and shake gently to level it out.
Bake for 30-35 minutes, or until a toothpick inserted into the center comes out clean.
Let it cool in the pan for about 10-15 minutes, then invert onto a cooling rack.
In a medium bowl, whisk together the powdered sugar and lemon juice until smooth. Adjust the consistency as needed.
Once the cake is completely cool, drizzle the lemon glaze over the top.