Why does yellow cake use extra egg yolks?
Yolks bring richness, tenderness, and that classic golden color. They also make the cake taste more “buttery” even when the butter amount stays reasonable.
Can I use all-purpose flour instead of cake flour?
Yes, but do not swap 1:1 by volume if you can help it. Cake flour is lighter and lower-protein, and a straight cup-for-cup all-purpose swap can make the cake a bit tighter.
Best option: use a kitchen scale. For this recipe, use 330 g all-purpose flour.
No scale option: measure 2 3/4 cups all-purpose flour, then remove 5 tablespoons and replace with 5 tablespoons cornstarch. Whisk well (or sift) to combine.
How do I keep my cake from turning out dense?
Two big things: make sure your butter, eggs, and milk are at room temperature, and do not overmix once flour goes in. Mix just until you stop seeing dry streaks, then stop.
Can I bake this in a 9x13 pan?
Yes. Grease the pan and line it with parchment (a simple sling makes lifting easy), then lightly grease the parchment too. Bake at 350°F for about 32 to 40 minutes. Start checking at 30 minutes. Glass pans often run a little longer than metal.
You want a clean toothpick or a few moist crumbs, not wet batter. For extra confidence, aim for an internal temperature around 200 to 205°F (93 to 96°C) in the center.
What frosting is best with yellow cake?
Chocolate frosting is the classic. Vanilla buttercream is great if you want pure birthday-cake energy. For something a little grown-up, do whipped chocolate ganache with a pinch of flaky salt.