Portillo's

I can confirm that the secret recipe for Portillo’s Chocolate Cake is as simple as adding a cup of mayonnaise, a cup of water, and three eggs to a box of chocolate cake mix and baking it in two 9-inch pans at 350 degrees for 30 minutes. The frosting on the cake is the kind you find in the baking aisle in tubs for $2. That's it.

The recipe I've described would cost around $6 to make at home, and yet you'll pay $75 to have a frozen version of the real Portillo's cake delivered to your house. I know this because I did it. It was the easiest way to confirm my suspicions about the recipe. And sure enough, the cake packaging listed ingredients one would find in just about every box of grocery store cake mix: diglycerides, dicalcium phosphate, and propylene glycol. 

Perhaps you prefer not to pay $75 for a cake you can make at home for 6 bucks. I get that. Maybe you also want chocolate cake that's not made with boxed cake mix because it’s, well, boxed cake mix. Same here. So, I wondered if I could make a similarly moist mayonnaise chocolate cake just like Portillo's, but this time from scratch, with wholesome ingredients in both the cake and the icing. Thankfully, after baking over a dozen different cakes I finally came up with a recipe that tastes like Portillo's Chocolate Cake but without the hard-to-spell additives found in the real thing.

And if mayonnaise sounds like an unusual ingredient for a cake, fear not. Practically everything in it benefits your cake batter. The blend of eggs and fat helps keep the cake fluffy and moist, salt and sugar add flavor, as do the vinegar and lemon juice which also assist with the leavening process to produce a tall cake with a light crumb. You could say mayonnaise is the perfect ingredient.

Thin-sliced roast beef is dunked in herbed gravy to soak up the flavor, then it’s stacked on a warm Italian sandwich roll and topped with sweet peppers or spicy hot Giardiniera. The recipe may seem like a simple one, but if any component of this iconic sandwich isn’t faithful to the Chi-Town original, true beef fanatics will cry “foul” quicker than bleacher bums at Wrigley field.

Get this recipe for free on my Food Hacker Blog here.