A good friend of mine recommended Flour, Joanne Chang's cookbook. The recipes aren't basic, but the instructions are excellent. The results are delicious.
I don't have this cookbook, but I found its recipe for yellow cake with fluffy chocolate frosting on the Serious Eats website. It's a yellow cake with a buttercream frosting.
I am picky about icing on cake. I don't like it too sweet. Most of the time, a large portion of cake frosting stays on my otherwise empty plate. This frosting was perfect. It was chocolately and not too sweet, flavored by adding a chocolate ganache to the buttercream base.
The cake itself was moist and tasty. My friend was right. This is probably the best yellow cake I've ever had.