Adjust an oven rack to the middle position and preheat oven to 325 degrees. Grease a 12-cup Bundt pan well with butter.
In a large bowl add the yellow cake mix, eggs, vegetable oil, lemon pudding mix, and 7UP. Stir well to combine.
Pour the batter into prepared pan and bake until a toothpick inserted in the middle of the cake comes out clean with a few crumbs attached, about 45 to 55 minutes.
Remove from the oven and cool completely in the pan on a wire rack. Remove cake from the Bundt pan.
To make the glaze, in a medium bowl, whisk together the powdered sugar, lemon juice, lime juice, 7UP, and zest. Drizzle over the cooled cake.
Video
Notes
Yellow cake mix: Based on convenience recipes of the 50’s, this 7Up cake starts with a boxed mix. Find the equally delicious from-scratch version in the “Recipe Tips and Variations” section.
7Up soda: 7Up has a higher amount of carbonation than say, Sprite, which helps the cake rise the best out of all the options. See FAQs for more information.
Yield: This cake makes 12 luscious slices.
Storage: Store extra cake covered at room temperature for up to 4 days.
7UP Pound Cake from scratch:
Adjust an oven to the middle position and preheat oven to 325 degrees. Grease a 12-cup Bundt pan well with butter.
In a standing mixer, cream 1 ½ cups butter (3 sticks) and 3 cups granulated sugar on medium speed until pale and fluffy, about 10 minutes.
Add 5 eggs to the mixture one at a time, beating after each is added in. Add 3 cups self-rising flour and 2 tablespoons lemon juice.
Remove the bowl from the mixer. Fold in ¾ cup 7UP. Pour mixture into prepared pan.
Bake until a toothpick inserted in the middle of the cake comes out clean with a few crumbs attached, about 60 to 75 minutes. Remove from the oven and cool completely on a wire rack.
Once cool, remove from the pan and drizzle with the Lemon Glaze. If using the from-scratch method, each slice (assuming 12 slices per cake) is 576 calories.