I took a basic vanilla cake recipe and made a big batch of that. Then I split it into 3 bowls. To the first bowl I added some more vanilla. To the next I added a little spearmint flavouring and green food colouring. To the third I added some strawberry puree (about 10 strawberries pureed) and a little pink food colouring. You could just use strawberry flavouring, but why not use the real stuff if you have it?
Then I added 'splotches' of each flavour to the pan. Once all the mixture was added in I swirled it with a toothpick.
Bake as usual, then let it cool. Decorate as you wish- there are so many ways! I decided to do rosettes in the three colours, but you could just do plain rosettes or frosting and let the inside be a pleasant surprise!
I found that the flavours went together well. But there are so many other options depending on what you have in your cupboard- chocolate, orange and vanilla? chocolate, lemon and strawberry? Chocolate, mint and orange? So many options, my mouth is watering already.....