A boxed cake mix gets a bakery-style upgrade with extra egg yolk, buttermilk, and butter for a tall, tender crumb.
Prep Time 15 minutes mins
Cook Time 30 minutes mins
Total Time 45 minutes mins
1. For chocolate version: use chocolate cake mix and add 1 tbsp instant espresso powder dissolved in the milk.
2. For lemon version: add zest of 1 lemon and 1 tbsp lemon juice; use buttermilk.
3. Store unfrosted layers wrapped in plastic at room temperature for up to 2 days, or freeze for up to 3 months.
4. If using a gluten-free cake mix, follow the same instructions but do not overmix and let cool completely before handling.
5. To avoid doming, use cake strips or bake at 325°F. Level domes with a serrated knife if needed.