I just had a slice of apple buttermilk cake I baked last month (these things can be frozen & thawed overnight)...it was soooo heavenly!!!
I used this recipe but improved (in my view) by increasing the amount of apples (from 2 to 3) and (I think) butter too (from 1/2 to 1 stick).
https://12tomatoes.com/frosted-buttermilk-apple-cake-loaf/
Whatever I did, the result was feather-light, fruity and fluffy!! I must do this again. I like using McIntosh for baking. I love that melt-in-the-mouth feel & flavor.