Big fan of rhubarb & strawberry... though we don't have Big Red Soda over here. Seems like its an American Cream Soda?
Current favourite cake recipe is...
Take a large microwave safe mug and add into it...
4 tablespoons of self raising flour
3 tablespoons of sugar
3 tablespoons of cocoa
3 tablespoons of milk
3 tablespoons of oil
1 egg
Optional few tablespoons of nutella
Mix. Microwave full power for approx 2 minutes.
Chocolate cake in 5 minutes.