Dr. Pepper Cake

Dr. Pepper cake is a Southern oddity that should not work but does spectacularly. The soda’s carbonation tenderizes the batter, while its 23-flavor signature (cherry, cola, faint almond, vanilla) ghost-haunts the chocolate cake with notes nobody can quite identify. Anyone who tastes it asks what the secret ingredient is.

The technique is classic Texas sheet cake. Margarine melts into the Dr. Pepper on the stovetop, then pours into the dry flour-sugar-cocoa-cinnamon mixture. Eggs, buttermilk, and baking soda go in last. The whole thing bakes in 25 minutes flat in a sheet pan, which means a deep crowd-feeding cake without the layers and assembly of a true layer cake.

The frosting is the move that makes this dish iconic. Made on the stovetop while the cake is still baking, it pours over the cake hot and immediately sinks into the still-warm crumb. The result is a moist, almost-pudding-cake texture along the surface with a fudgy top crust that sets as it cools.

Nuts in the frosting are traditional but optional. Pecans are most common in Texas; walnuts work fine elsewhere.

Pro Tips

• Don’t let the Dr. Pepper-margarine mixture boil. Boiling kills the carbonation, and you lose some of the tenderizing lift the soda provides.
• Pour the frosting on the cake within 60 seconds of removing it from the oven. The hot cake absorbs the frosting properly only when both are hot. Cold cake + hot frosting = sliding sticky topping.
• Cool completely before slicing, ideally 2 hours. The cake firms up as it cools and slices into clean squares.

Variations

• Try Coca-Cola, Cherry Coke, or root beer in place of Dr. Pepper for different soda-cake variations.
• Add 1 cup of marshmallows sprinkled on the cake just before pouring the frosting for a rocky-road effect.
• Use pecans instead of generic nuts for an authentic Texas-style finish.