To the dry mix of one box of cake mix, pour in 12 ounces of your choice of soda. Stir to combine. Pour the batter into a well-oiled and flour-dusted pan Pro-tip from the Reddit post I referenced: "for ...
Dusting them with flour before adding to the cake mix can help to reduce this happening. If you want to increase the almond content of this cake add 75g/2½oz diced marzipan when you add the cherries.