Add flour alternately with 7UP, mixing in until just combined.
3 cups sifted all-purpose flour, ¾ cup 7UP soda
Transfer batter to prepared pan.
Bake for about 60-75 minutes, or until a toothpick inserted in the center comes out clean. Check the cake around 30-35 minutes. If the cake starts to brown too quickly, tent it with aluminum foil.
Cool in the pan for 15 minutes.
Remove to a wire rack to cool completely.
For the icing, mix the powdered sugar, lemon juice, lemon zest, and enough 7UP to make a thick but pourable icing.
1½ cups powdered sugar, 1 tablespoon fresh lemon juice, ½ teaspoon grated lemon zest, 1-2 tablespoons 7UP soda
Drizzle the icing over the cooled cake.
Notes
Butter: I use salted butter. If you’d like to use unsalted butter, add 3/4 teaspoon salt with the flour.
Lemon juice: It’s important to use fresh lemon juice because bottled lemon juice can have an off taste.
All-purpose flour: Be sure to properly measure your flour. To do so, either weigh the flour or stir or sift the flour to break it up. Lightly spoon into the measuring cup and level. Too much flour can give you a dry, heavy, or doughy cake.
7UP soda: A similar soda, like Sprite, will also work in this recipe.