2. Combine 1 box cake mix with 1 cup water, ⅓ cup oil and 3 egg whites in a large bowl and whisk until blended. Separate half of batter into another large bowl.

Who’s behind it: 39-year-old Alison Friedman. Based in: Fairfax. Backstory: The classically trained pastry chef opened her company in 2017. First one she made: A two-tiered cake covered in ...