Try this Lemon Surprise Cake recipe, or contribute your own.
The ingredient list leaves out how the carbonation in the soda interacts with the protein structure of the flour. Lemon-lime soda introduces dissolved carbon dioxide, which expands within the batter during baking to create a lighter crumb than standard dairy liquids achieve. Creaming the butter and sugar thoroughly until pale and fluffy incorporates air pockets that hold this expanding gas.
Bakes containing high fat ratios freeze successfully for up to three months when wrapped tightly in plastic wrap followed by aluminum foil. Thaw the cake overnight in the refrigerator while still wrapped to prevent condensation from dissolving the confectioners sugar glaze. Bring the portions to room temperature before serving to soften the butter solids in the crumb.