Preheat the oven to 325 degrees Fahrenheit. Spray a 10-inch bundt cake pan with nonstick cooking spray and dust the inside with flour, tapping out the excess. Alternatively, you may use a cooking spray that already has flour in it.
Add 3 cups all-purpose flour and ½ teaspoon salt to a small bowl and whisk to combine. Set aside.
Add 1 ½ cups softened unsalted butter and 3 cups granulated sugar to a large bowl and beat with a hand mixer or a stand mixer fitted with the paddle attachment until light and fluffy, about 4 minutes.
Add ¾ cup 7Up soda, 1 tablespoon lemon zest, 1 tablespoon lemon extract, and 1 teaspoon vanilla extract and beat until combined.
Add 5 large eggs one at a time, beating thoroughly between each egg. Scrape down the sides and bottom of the bowl as needed.
Add 3 cups all-purpose flourhe flour mixture to the bowl and mix until smooth and combined.
Pour the batter into the bundt pan and smooth over the top. Bake for 70-85 minutes or until a toothpick comes out clean from the center of the cake.
Let the cake cool in the pan for about 10 minutes before inverting it onto a cooling rack to finish cooling
Once the cake is cooled, prepare the glaze by whisking together 1 ½ cups powdered sugar, 1 teaspoon lemon zest, and 2-3 tablespoons 7Up soda,. Drizzle over the cake, slice, and serve.