Preheat oven to 325°. Spray a 10- to 12-cup Bundt pan with baking spray with flour.
In a large bowl, beat cake mix, flour, pudding mix, soda, oil, and eggs with a mixer at medium speed until smooth, stopping to scrape sides of bowl, about 3 minutes. Pour batter into prepared pan.
Bake until a wooden pick inserted near center comes out clean, about 45 minutes. Let cool in pan for 10 minutes. Remove from pan, and let cool completely on a wire rack. Sprinkle with confectioners’ sugar, if desired. Store in an airtight container for up to 3 days.
Notes
Sprite, 7UP, and Mountain Dew all work well in this recipe.
Recipe by Paula Deen Magazine at https://pauladeenmagazine.com/2-lemon-lime-soda-cake-recipe/