Hi! Not only am I on the hunt for a carrot cake recipe, but I'm also looking for a red velvet recipe (I have already tried 2 and so far not much luck) and have come across my top three options. However, I'm having a hard time deciding which way I should go and this mostly has to do with the fat ratios. So my top three options are Sugarspunrun, Broma Bakery and House of Nash Eats. Mostly, they are all VERY similar there are just some differences in flour and fat contents.

Sugarspunrun has 1 1/2 cups buttermilk 1/2 cup oil 1/2 butter and 2 1/4 cups of AP flour. Broma Bakery has 1 1/3 cup buttermilk 1/2 cup oil 1/2 butter and 2 1/2 cups of AP flour. House of Nash Eats has 1 cup buttermilk 1 cup oil 1/2 butter and 3 cups of cake flour.

So my big question here is which is a better ratio for red velvet cake? is it better to use more oil than butter or a 50/50 ratio of oil to butter? is it better to have more buttermilk to oil or the same amount of each? is cake flour better than AP flour? I've tried googling this but I haven't gotten much information so I thought getting some Reddit input would help me decide and also learn more about what makes cakes better. Thanks in advance!

Side note: the reason I'm overanalyzing this is because it's just in my nature lol, and I don't want to waste too many more ingredients on testing a bunch of recipes, it's just not practical for me at the moment.