GETTING MY RAINBOW CAKE WEED STRAIN TO WORK

Decorated differently from the rest, this rainbow cake by Tesco features a enjoyment do-it-yourself vibe with the vibrant blue buttercream which surely causes it to be jump out from the gang.) and am planning to have to make it in two layers rather than three. Do you have any ideas for bake time/temp based on fitting the batter into two pans instea